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Java Matcher对象中find()与matches()的区别

news 2025/8/1 7:03:44

`find()`：字符串某个部分匹配上正则表达式就会返回true
`matches()`：字符串整体匹配上正则表达式才返回true

find()：字符串某个部分匹配上正则表达式就会返回true

Pattern compile = Pattern.compile("[WASD][0-9]{1,2}");
System.out.println(compile.matcher("A1").find());  //true
System.out.println(compile.matcher("A12").find());  //true
System.out.println(compile.matcher("E12").find());  //false
System.out.println(compile.matcher("AE12").find());  //false
System.out.println(compile.matcher("AEA12").find());  //true
System.out.println(compile.matcher("AEA1A2").find());  //true
System.out.println(compile.matcher("AEA12444").find());  //true

matches()：字符串整体匹配上正则表达式才返回true

Pattern compile = Pattern.compile("[WASD][0-9]{1,2}");
System.out.println(compile.matcher("A122").matches());  //false
System.out.println(compile.matcher("AA12").matches());  //false
System.out.println(compile.matcher("A12").matches());  //true
System.out.println(compile.matcher("A1").matches());  //true
System.out.println(compile.matcher("AA1").matches());  //false
System.out.println(compile.matcher("AA12").matches());  //falseSystem.out.println("A122".matches("[WASD][0-9]{1,2}")); // false
System.out.println("AA12".matches("[WASD][0-9]{1,2}")); // false
System.out.println("A12".matches("[WASD][0-9]{1,2}")); // true
System.out.println("A1".matches("[WASD][0-9]{1,2}")); // true
System.out.println("A1".matches("[WASD]{1,2}[0-9]{1,2}")); // true
System.out.println("A12".matches("[WASD]{1,2}[0-9]{1,2}")); // true
System.out.println("AA1".matches("[WASD]{1,2}[0-9]{1,2}")); // true
System.out.println("AA12".matches("[WASD]{1,2}[0-9]{1,2}")); // true

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