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

limit是正整數時表示分割成幾個字串，先分割前面的

limit是負整數時表示完全分割，子串可能會是""

limit是0時，與split("分割符")同義，子串不會是""

       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, , ]

以上基於jdk1.8