java, split(regex) 和 split(regex, limit)用法

limit是正整数时表示分割成几个字串，先分割前面的

limit是负整数时表示完全分割，子串可能会是""

limit是0时，与split("分割符")同义，子串不会是""

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String str = "a,b,c,,";
String[] strAry = str.split(",");
System.out.print(strAry.length);
System.out.println(Arrays.asList(strAry));

String[] strAry0 = str.split(",",0);
System.out.print(strAry0.length);
System.out.println(Arrays.asList(strAry0));

String[] strAry1 = str.split(",",1);
System.out.print(strAry1.length);
System.out.println(Arrays.asList(strAry1));

String[] strAry2 = str.split(",",2);
System.out.print(strAry2.length);
System.out.println(Arrays.asList(strAry2));

String[] strAry_1= str.split(",",-1);
System.out.print(strAry_1.length);
System.out.println(Arrays.asList(strAry_1));

String[] strAry_2 = str.split(",",-2);
System.out.print(strAry_2.length);
System.out.println(Arrays.asList(strAry_2));

3[a, b, c]
3[a, b, c]
1[a,b,c,,]
2[a, b,c,,]
5[a, b, c, , ]
5[a, b, c, , ]

以上基于jdk1.8