java split()方法输出示例

在java里，split()方法如果只传入分割字符，那么会自动去除结尾的空字符串。

以前一直不知道，到底写了多少隐藏的bug，ヽ（゜ロ゜；）ノ

情况1

String str = "6000,5000";
String[] s = str.split(",");
System.out.println(Arrays.toString(s));// [6000, 5000]
System.out.println(s.length);// 2

情况2

String str = "6000,5000";
String[] s = str.split(",", -1);
System.out.println(Arrays.toString(s));// [6000, 5000]
System.out.println(s.length);// 2

情况3

String str = "6000,";
String[] s = str.split(",");
System.out.println(Arrays.toString(s));// [6000]
System.out.println(s.length);// 1

情况4

String str = "6000,";
String[] s = str.split(",", -1);
System.out.println(Arrays.toString(s));// [6000, ]
System.out.println(s.length);// 2

情况5

String str = ",6000";
String[] s = str.split(",");
System.out.println(Arrays.toString(s));// [, 6000]
System.out.println(s.length);// 2

情况6

String str = ",6000";
String[] s = str.split(",", -1);
System.out.println(Arrays.toString(s));// [, 6000]
System.out.println(s.length);// 2

情况7

String str = ",";
String[] s = str.split(",");
System.out.println(Arrays.toString(s));// []
System.out.println(s.length);// 0

情况8

String str = ",";
String[] s = str.split(",", -1);
System.out.println(Arrays.toString(s));// [, ]
System.out.println(s.length);// 2

情况9

String str = "";
String[] s = str.split(",");
System.out.println(Arrays.toString(s));// []
System.out.println(s.length);// 1

情况10

String str = "";
String[] s = str.split(",", -1);
System.out.println(Arrays.toString(s));// []
System.out.println(s.length);// 1

总结

split()不传limit参数时会自动去除结尾的空字符串。

上述所有代码都可以直接运行。