Java 库的建立方法及其实例（6）
接下来，看看Matcher类。这个类实现了MatchResult interface. 看看MatchResult的定义：
[games]$javap -classpath .. -s jregex.MatchResult
Compiled from jregex/MatchResult.java
public interface jregex.MatchResult
/* ACC_SUPER bit NOT set */
{
public static final int MATCH;
/* I */
public static final int PREFIX;
/* I */
public static final int SUFFIX;
/* I */
public static final int TARGET;
/* I */
public abstract jregex.Pattern pattern();
/* ()Ljregex/Pattern; */
public abstract int groupCount();
/* ()I */
public abstract boolean isCaptured();
/* ()Z */
public abstract boolean isCaptured(int);
/* (I)Z */
public abstract boolean isCaptured(java.lang.String);
/* (Ljava/lang/String;)Z */
public abstract java.lang.String group(int);
/* (I)Ljava/lang/String; */
public abstract boolean getGroup(int, java.lang.StringBuffer);
/* (ILjava/lang/StringBuffer;)Z */
public abstract boolean getGroup(int, jregex.TextBuffer);
/* (ILjregex/TextBuffer;)Z */
public abstract java.lang.String group(java.lang.String);
/* (Ljava/lang/String;)Ljava/lang/String; */
public abstract boolean getGroup(java.lang.String, java.lang.StringBuffer);
/* (Ljava/lang/String;Ljava/lang/StringBuffer;)Z */
public abstract boolean getGroup(java.lang.String, jregex.TextBuffer);
/* (Ljava/lang/String;Ljregex/TextBuffer;)Z */
public abstract java.lang.String prefix();
/* ()Ljava/lang/String; */
public abstract java.lang.String suffix();
/* ()Ljava/lang/String; */
public abstract java.lang.String target();
/* ()Ljava/lang/String; */
public abstract int targetStart();
/* ()I */
public abstract int targetEnd();
/* ()I */
public abstract char targetChars()[];
/* ()[C */
public abstract int start();
/* ()I */
public abstract int end();
/* ()I */
public abstract int length();
/* ()I */
public abstract int start(int);
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