TextComponentTagVisitor.java

net.minecraft.nbt.TextComponentTagVisitor

信息

• 全限定名：net.minecraft.nbt.TextComponentTagVisitor
• 类型：public class
• 包：net.minecraft.nbt
• 源码路径：src/main/java/net/minecraft/nbt/TextComponentTagVisitor.java
• 起始行号：L19
• 实现：TagVisitor
• 职责：

  TODO

字段/常量

• LOGGER

  • 类型: Logger
  • 修饰符: private static final
  • 源码定位: L20
  • 说明:

    TODO

• INLINE_LIST_THRESHOLD

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L21
  • 说明:

    TODO

• MAX_DEPTH

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L22
  • 说明:

    TODO

• MAX_LENGTH

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L23
  • 说明:

    TODO

• SIMPLE_VALUE

  • 类型: Pattern
  • 修饰符: private static final
  • 源码定位: L24
  • 说明:

    TODO

• NEWLINE

  • 类型: Component
  • 修饰符: private static final
  • 源码定位: L25
  • 说明:

    TODO

• ELEMENT_SPACING

  • 类型: Component
  • 修饰符: private static final
  • 源码定位: L26
  • 说明:

    TODO

• indentation

  • 类型: String
  • 修饰符: private final
  • 源码定位: L27
  • 说明:

    TODO

• styling

  • 类型: TextComponentTagVisitor.Styling
  • 修饰符: private final
  • 源码定位: L28
  • 说明:

    TODO

• sortKeys

  • 类型: boolean
  • 修饰符: private final
  • 源码定位: L29
  • 说明:

    TODO

• indentDepth

  • 类型: int
  • 修饰符: private
  • 源码定位: L30
  • 说明:

    TODO

• depth

  • 类型: int
  • 修饰符: private
  • 源码定位: L31
  • 说明:

    TODO

• result

  • 类型: MutableComponent
  • 修饰符: private final
  • 源码定位: L32
  • 说明:

    TODO

内部类/嵌套类型

• net.minecraft.nbt.TextComponentTagVisitor.PlainStyling

  • 类型: class
  • 修饰符: public static
  • 源码定位: L309
  • 说明:

    TODO

• net.minecraft.nbt.TextComponentTagVisitor.RichStyling

  • 类型: class
  • 修饰符: public static
  • 源码定位: L340
  • 说明:

    TODO

• net.minecraft.nbt.TextComponentTagVisitor.Styling

  • 类型: interface
  • 修饰符: public
  • 源码定位: L389
  • 说明:

    TODO

• net.minecraft.nbt.TextComponentTagVisitor.Token

  • 类型: enum
  • 修饰符: public static
  • 源码定位: L399
  • 说明:

    TODO

构造器

public TextComponentTagVisitor(String indentation) @ L34

• 构造器名：TextComponentTagVisitor
• 源码定位：L34
• 修饰符：public

参数:

• indentation: String

说明:

TODO

public TextComponentTagVisitor(String indentation, TextComponentTagVisitor.Styling styling) @ L38

• 构造器名：TextComponentTagVisitor
• 源码定位：L38
• 修饰符：public

参数:

• indentation: String
• styling: TextComponentTagVisitor.Styling

说明:

TODO

public TextComponentTagVisitor(String indentation, TextComponentTagVisitor.Styling styling, boolean sortKeys) @ L42

• 构造器名：TextComponentTagVisitor
• 源码定位：L42
• 修饰符：public

参数:

• indentation: String
• styling: TextComponentTagVisitor.Styling
• sortKeys: boolean

说明:

TODO

方法

下面的方法块按源码顺序生成。

public Component visit(Tag tag) @ L48

• 方法名：visit
• 源码定位：L48
• 返回类型：Component
• 修饰符：public

参数:

• tag: Tag

说明:

TODO

private TextComponentTagVisitor append(String string, Style style) @ L53

• 方法名：append
• 源码定位：L53
• 返回类型：TextComponentTagVisitor
• 修饰符：private

参数:

• string: String
• style: Style

说明:

TODO

private TextComponentTagVisitor append(Component component) @ L58

• 方法名：append
• 源码定位：L58
• 返回类型：TextComponentTagVisitor
• 修饰符：private

参数:

• component: Component

说明:

TODO

private TextComponentTagVisitor append(TextComponentTagVisitor.Token token) @ L63

• 方法名：append
• 源码定位：L63
• 返回类型：TextComponentTagVisitor
• 修饰符：private

参数:

• token: TextComponentTagVisitor.Token

说明:

TODO

public void visitString(StringTag tag) @ L68

• 方法名：visitString
• 源码定位：L68
• 返回类型：void
• 修饰符：public

参数:

• tag: StringTag

说明:

TODO

public void visitByte(ByteTag tag) @ L75

• 方法名：visitByte
• 源码定位：L75
• 返回类型：void
• 修饰符：public

参数:

• tag: ByteTag

说明:

TODO

public void visitShort(ShortTag tag) @ L80

• 方法名：visitShort
• 源码定位：L80
• 返回类型：void
• 修饰符：public

参数:

• tag: ShortTag

说明:

TODO

public void visitInt(IntTag tag) @ L85

• 方法名：visitInt
• 源码定位：L85
• 返回类型：void
• 修饰符：public

参数:

• tag: IntTag

说明:

TODO

public void visitLong(LongTag tag) @ L90

• 方法名：visitLong
• 源码定位：L90
• 返回类型：void
• 修饰符：public

参数:

• tag: LongTag

说明:

TODO

public void visitFloat(FloatTag tag) @ L95

• 方法名：visitFloat
• 源码定位：L95
• 返回类型：void
• 修饰符：public

参数:

• tag: FloatTag

说明:

TODO

public void visitDouble(DoubleTag tag) @ L100

• 方法名：visitDouble
• 源码定位：L100
• 返回类型：void
• 修饰符：public

参数:

• tag: DoubleTag

说明:

TODO

public void visitByteArray(ByteArrayTag tag) @ L105

• 方法名：visitByteArray
• 源码定位：L105
• 返回类型：void
• 修饰符：public

参数:

• tag: ByteArrayTag

说明:

TODO

public void visitIntArray(IntArrayTag tag) @ L126

• 方法名：visitIntArray
• 源码定位：L126
• 返回类型：void
• 修饰符：public

参数:

• tag: IntArrayTag

说明:

TODO

public void visitLongArray(LongArrayTag tag) @ L147

• 方法名：visitLongArray
• 源码定位：L147
• 返回类型：void
• 修饰符：public

参数:

• tag: LongArrayTag

说明:

TODO

private static boolean shouldWrapListElements(ListTag list) @ L168

• 方法名：shouldWrapListElements
• 源码定位：L168
• 返回类型：boolean
• 修饰符：private static

参数:

• list: ListTag

说明:

TODO

public void visitList(ListTag tag) @ L182

• 方法名：visitList
• 源码定位：L182
• 返回类型：void
• 修饰符：public

参数:

• tag: ListTag

说明:

TODO

public void visitCompound(CompoundTag tag) @ L229

• 方法名：visitCompound
• 源码定位：L229
• 返回类型：void
• 修饰符：public

参数:

• tag: CompoundTag

说明:

TODO

private void appendSubTag(Tag tag, boolean indent) @ L276

• 方法名：appendSubTag
• 源码定位：L276
• 返回类型：void
• 修饰符：private

参数:

• tag: Tag
• indent: boolean

说明:

TODO

private Component handleEscapePretty(String input) @ L294

• 方法名：handleEscapePretty
• 源码定位：L294
• 返回类型：Component
• 修饰符：private

参数:

• input: String

说明:

TODO

public void visitEnd(EndTag tag) @ L305

• 方法名：visitEnd
• 源码定位：L305
• 返回类型：void
• 修饰符：public

参数:

• tag: EndTag

说明:

TODO

代码

public class TextComponentTagVisitor implements TagVisitor {
    private static final Logger LOGGER = LogUtils.getLogger();
    private static final int INLINE_LIST_THRESHOLD = 8;
    private static final int MAX_DEPTH = 64;
    private static final int MAX_LENGTH = 128;
    private static final Pattern SIMPLE_VALUE = Pattern.compile("[A-Za-z0-9._+-]+");
    private static final Component NEWLINE = Component.literal("\n");
    private static final Component ELEMENT_SPACING = Component.literal(" ");
    private final String indentation;
    private final TextComponentTagVisitor.Styling styling;
    private final boolean sortKeys;
    private int indentDepth;
    private int depth;
    private final MutableComponent result = Component.empty();
 
    public TextComponentTagVisitor(String indentation) {
        this(indentation, TextComponentTagVisitor.RichStyling.INSTANCE);
    }
 
    public TextComponentTagVisitor(String indentation, TextComponentTagVisitor.Styling styling) {
        this(indentation, styling, LOGGER.isDebugEnabled());
    }
 
    public TextComponentTagVisitor(String indentation, TextComponentTagVisitor.Styling styling, boolean sortKeys) {
        this.indentation = indentation;
        this.styling = styling;
        this.sortKeys = sortKeys;
    }
 
    public Component visit(Tag tag) {
        tag.accept(this);
        return this.result;
    }
 
    private TextComponentTagVisitor append(String string, Style style) {
        this.result.append(Component.literal(string).withStyle(style));
        return this;
    }
 
    private TextComponentTagVisitor append(Component component) {
        this.result.append(component);
        return this;
    }
 
    private TextComponentTagVisitor append(TextComponentTagVisitor.Token token) {
        this.result.append(this.styling.token(token));
        return this;
    }
 
    @Override
    public void visitString(StringTag tag) {
        String quoted = StringTag.quoteAndEscape(tag.value());
        Component quote = Component.literal(quoted.substring(0, 1));
        this.append(quote).append(quoted.substring(1, quoted.length() - 1), this.styling.stringStyle()).append(quote);
    }
 
    @Override
    public void visitByte(ByteTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.BYTE_SUFFIX);
    }
 
    @Override
    public void visitShort(ShortTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.SHORT_SUFFIX);
    }
 
    @Override
    public void visitInt(IntTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle());
    }
 
    @Override
    public void visitLong(LongTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.LONG_SUFFIX);
    }
 
    @Override
    public void visitFloat(FloatTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.FLOAT_SUFFIX);
    }
 
    @Override
    public void visitDouble(DoubleTag tag) {
        this.append(String.valueOf(tag.value()), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.DOUBLE_SUFFIX);
    }
 
    @Override
    public void visitByteArray(ByteArrayTag tag) {
        this.append(TextComponentTagVisitor.Token.LIST_OPEN)
            .append(TextComponentTagVisitor.Token.BYTE_ARRAY_PREFIX)
            .append(TextComponentTagVisitor.Token.LIST_TYPE_SEPARATOR);
        byte[] data = tag.getAsByteArray();
 
        for (int i = 0; i < data.length && i < 128; i++) {
            this.append(ELEMENT_SPACING).append(String.valueOf(data[i]), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.BYTE_SUFFIX);
            if (i != data.length - 1) {
                this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR);
            }
        }
 
        if (data.length > 128) {
            this.append(TextComponentTagVisitor.Token.FOLDED);
        }
 
        this.append(TextComponentTagVisitor.Token.LIST_CLOSE);
    }
 
    @Override
    public void visitIntArray(IntArrayTag tag) {
        this.append(TextComponentTagVisitor.Token.LIST_OPEN)
            .append(TextComponentTagVisitor.Token.INT_ARRAY_PREFIX)
            .append(TextComponentTagVisitor.Token.LIST_TYPE_SEPARATOR);
        int[] data = tag.getAsIntArray();
 
        for (int i = 0; i < data.length && i < 128; i++) {
            this.append(ELEMENT_SPACING).append(String.valueOf(data[i]), this.styling.numberStyle());
            if (i != data.length - 1) {
                this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR);
            }
        }
 
        if (data.length > 128) {
            this.append(TextComponentTagVisitor.Token.FOLDED);
        }
 
        this.append(TextComponentTagVisitor.Token.LIST_CLOSE);
    }
 
    @Override
    public void visitLongArray(LongArrayTag tag) {
        this.append(TextComponentTagVisitor.Token.LIST_OPEN)
            .append(TextComponentTagVisitor.Token.LONG_ARRAY_PREFIX)
            .append(TextComponentTagVisitor.Token.LIST_TYPE_SEPARATOR);
        long[] data = tag.getAsLongArray();
 
        for (int i = 0; i < data.length && i < 128; i++) {
            this.append(ELEMENT_SPACING).append(String.valueOf(data[i]), this.styling.numberStyle()).append(TextComponentTagVisitor.Token.LONG_SUFFIX);
            if (i != data.length - 1) {
                this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR);
            }
        }
 
        if (data.length > 128) {
            this.append(TextComponentTagVisitor.Token.FOLDED);
        }
 
        this.append(TextComponentTagVisitor.Token.LIST_CLOSE);
    }
 
    private static boolean shouldWrapListElements(ListTag list) {
        if (list.size() >= 8) {
            return false;
        } else {
            for (Tag element : list) {
                if (!(element instanceof NumericTag)) {
                    return true;
                }
            }
 
            return false;
        }
    }
 
    @Override
    public void visitList(ListTag tag) {
        if (tag.isEmpty()) {
            this.append(TextComponentTagVisitor.Token.LIST_OPEN).append(TextComponentTagVisitor.Token.LIST_CLOSE);
        } else if (this.depth >= 64) {
            this.append(TextComponentTagVisitor.Token.LIST_OPEN).append(TextComponentTagVisitor.Token.FOLDED).append(TextComponentTagVisitor.Token.LIST_CLOSE);
        } else if (!shouldWrapListElements(tag)) {
            this.append(TextComponentTagVisitor.Token.LIST_OPEN);
 
            for (int i = 0; i < tag.size(); i++) {
                if (i != 0) {
                    this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR).append(ELEMENT_SPACING);
                }
 
                this.appendSubTag(tag.get(i), false);
            }
 
            this.append(TextComponentTagVisitor.Token.LIST_CLOSE);
        } else {
            this.append(TextComponentTagVisitor.Token.LIST_OPEN);
            if (!this.indentation.isEmpty()) {
                this.append(NEWLINE);
            }
 
            Component entryIndent = Component.literal(this.indentation.repeat(this.indentDepth + 1));
            Component elementSpacing = this.indentation.isEmpty() ? ELEMENT_SPACING : NEWLINE;
 
            for (int i = 0; i < tag.size() && i < 128; i++) {
                this.append(entryIndent);
                this.appendSubTag(tag.get(i), true);
                if (i != tag.size() - 1) {
                    this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR).append(elementSpacing);
                }
            }
 
            if (tag.size() > 128) {
                this.append(entryIndent).append(TextComponentTagVisitor.Token.FOLDED);
            }
 
            if (!this.indentation.isEmpty()) {
                this.append(NEWLINE).append(Component.literal(this.indentation.repeat(this.indentDepth)));
            }
 
            this.append(TextComponentTagVisitor.Token.LIST_CLOSE);
        }
    }
 
    @Override
    public void visitCompound(CompoundTag tag) {
        if (tag.isEmpty()) {
            this.append(TextComponentTagVisitor.Token.STRUCT_OPEN).append(TextComponentTagVisitor.Token.STRUCT_CLOSE);
        } else if (this.depth >= 64) {
            this.append(TextComponentTagVisitor.Token.STRUCT_OPEN)
                .append(TextComponentTagVisitor.Token.FOLDED)
                .append(TextComponentTagVisitor.Token.STRUCT_CLOSE);
        } else {
            this.append(TextComponentTagVisitor.Token.STRUCT_OPEN);
            Collection<String> keys;
            if (this.sortKeys) {
                List<String> keyCopy = new ArrayList<>(tag.keySet());
                Collections.sort(keyCopy);
                keys = keyCopy;
            } else {
                keys = tag.keySet();
            }
 
            if (!this.indentation.isEmpty()) {
                this.append(NEWLINE);
            }
 
            Component entryIndent = Component.literal(this.indentation.repeat(this.indentDepth + 1));
            Component elementSpacing = this.indentation.isEmpty() ? ELEMENT_SPACING : NEWLINE;
            Iterator<String> iterator = keys.iterator();
 
            while (iterator.hasNext()) {
                String key = iterator.next();
                this.append(entryIndent)
                    .append(this.handleEscapePretty(key))
                    .append(TextComponentTagVisitor.Token.NAME_VALUE_SEPARATOR)
                    .append(ELEMENT_SPACING);
                this.appendSubTag(tag.get(key), true);
                if (iterator.hasNext()) {
                    this.append(TextComponentTagVisitor.Token.ELEMENT_SEPARATOR).append(elementSpacing);
                }
            }
 
            if (!this.indentation.isEmpty()) {
                this.append(NEWLINE).append(Component.literal(this.indentation.repeat(this.indentDepth)));
            }
 
            this.append(TextComponentTagVisitor.Token.STRUCT_CLOSE);
        }
    }
 
    private void appendSubTag(Tag tag, boolean indent) {
        if (indent) {
            this.indentDepth++;
        }
 
        this.depth++;
 
        try {
            tag.accept(this);
        } finally {
            if (indent) {
                this.indentDepth--;
            }
 
            this.depth--;
        }
    }
 
    private Component handleEscapePretty(String input) {
        if (SIMPLE_VALUE.matcher(input).matches()) {
            return Component.literal(input).withStyle(this.styling.keyStyle());
        } else {
            String quoted = StringTag.quoteAndEscape(input);
            String quote = quoted.substring(0, 1);
            Component inner = Component.literal(quoted.substring(1, quoted.length() - 1)).withStyle(this.styling.keyStyle());
            return Component.literal(quote).append(inner).append(quote);
        }
    }
 
    @Override
    public void visitEnd(EndTag tag) {
    }
 
    public static class PlainStyling implements TextComponentTagVisitor.Styling {
        public static final TextComponentTagVisitor.Styling INSTANCE = new TextComponentTagVisitor.PlainStyling();
        private final Map<TextComponentTagVisitor.Token, Component> tokens = new HashMap<>();
 
        private PlainStyling() {
            for (TextComponentTagVisitor.Token value : TextComponentTagVisitor.Token.values()) {
                this.tokens.put(value, Component.literal(value.text));
            }
        }
 
        @Override
        public Style keyStyle() {
            return Style.EMPTY;
        }
 
        @Override
        public Style stringStyle() {
            return Style.EMPTY;
        }
 
        @Override
        public Style numberStyle() {
            return Style.EMPTY;
        }
 
        @Override
        public Component token(TextComponentTagVisitor.Token token) {
            return Objects.requireNonNull(this.tokens.get(token));
        }
    }
 
    public static class RichStyling implements TextComponentTagVisitor.Styling {
        private static final Style SYNTAX_HIGHLIGHTING_NUMBER_TYPE = Style.EMPTY.withColor(ChatFormatting.RED);
        public static final TextComponentTagVisitor.Styling INSTANCE = new TextComponentTagVisitor.RichStyling();
        private final Map<TextComponentTagVisitor.Token, Component> tokens = new HashMap<>();
        private static final Style SYNTAX_HIGHLIGHTING_KEY = Style.EMPTY.withColor(ChatFormatting.AQUA);
        private static final Style SYNTAX_HIGHLIGHTING_STRING = Style.EMPTY.withColor(ChatFormatting.GREEN);
        private static final Style SYNTAX_HIGHLIGHTING_NUMBER = Style.EMPTY.withColor(ChatFormatting.GOLD);
 
        private RichStyling() {
            this.overrideToken(TextComponentTagVisitor.Token.FOLDED, Style.EMPTY.withColor(ChatFormatting.GRAY));
            this.overrideToken(TextComponentTagVisitor.Token.BYTE_SUFFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.BYTE_ARRAY_PREFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.SHORT_SUFFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.INT_ARRAY_PREFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.LONG_SUFFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.LONG_ARRAY_PREFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.FLOAT_SUFFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
            this.overrideToken(TextComponentTagVisitor.Token.DOUBLE_SUFFIX, SYNTAX_HIGHLIGHTING_NUMBER_TYPE);
 
            for (TextComponentTagVisitor.Token value : TextComponentTagVisitor.Token.values()) {
                this.tokens.putIfAbsent(value, Component.literal(value.text));
            }
        }
 
        private void overrideToken(TextComponentTagVisitor.Token token, Style style) {
            this.tokens.put(token, Component.literal(token.text).withStyle(style));
        }
 
        @Override
        public Style keyStyle() {
            return SYNTAX_HIGHLIGHTING_KEY;
        }
 
        @Override
        public Style stringStyle() {
            return SYNTAX_HIGHLIGHTING_STRING;
        }
 
        @Override
        public Style numberStyle() {
            return SYNTAX_HIGHLIGHTING_NUMBER;
        }
 
        @Override
        public Component token(TextComponentTagVisitor.Token token) {
            return Objects.requireNonNull(this.tokens.get(token));
        }
    }
 
    public interface Styling {
        Style keyStyle();
 
        Style stringStyle();
 
        Style numberStyle();
 
        Component token(final TextComponentTagVisitor.Token token);
    }
 
    public static enum Token {
        FOLDED("<...>"),
        ELEMENT_SEPARATOR(","),
        LIST_CLOSE("]"),
        LIST_OPEN("["),
        LIST_TYPE_SEPARATOR(";"),
        STRUCT_CLOSE("}"),
        STRUCT_OPEN("{"),
        NAME_VALUE_SEPARATOR(":"),
        BYTE_SUFFIX("b"),
        BYTE_ARRAY_PREFIX("B"),
        SHORT_SUFFIX("s"),
        INT_ARRAY_PREFIX("I"),
        LONG_SUFFIX("L"),
        LONG_ARRAY_PREFIX("L"),
        FLOAT_SUFFIX("f"),
        DOUBLE_SUFFIX("d");
 
        public final String text;
 
        private Token(String text) {
            this.text = text;
        }
    }
}

引用的其他类

• ByteArrayTag

  • 引用位置: 参数

• ByteTag

  • 引用位置: 参数

• CompoundTag

  • 引用位置: 参数

• DoubleTag

  • 引用位置: 参数

• EndTag

  • 引用位置: 参数

• FloatTag

  • 引用位置: 参数

• IntArrayTag

  • 引用位置: 参数

• IntTag

  • 引用位置: 参数

• ListTag

  • 引用位置: 参数

• LongArrayTag

  • 引用位置: 参数

• LongTag

  • 引用位置: 参数

• ShortTag

  • 引用位置: 参数

• StringTag

  • 引用位置: 参数/方法调用
  • 关联成员: StringTag.quoteAndEscape()

• Tag

  • 引用位置: 参数

• TagVisitor

  • 引用位置: 实现

• Component

  • 引用位置: 参数/字段/方法调用/返回值
  • 关联成员: Component.empty(), Component.literal()

• MutableComponent

  • 引用位置: 字段

• Style

  • 引用位置: 参数

• TropicalFish

  • 引用位置: 字段/方法调用
  • 关联成员: Pattern.compile()