Java中String.split()的最详细源码解读及注意事项

public class test {
    public static void main(String[] args) {
        String str = ",,1,2,3,4"; // 注意这里字符串开头就匹配到了逗号
        String[] s = str.split(",",10);// 这里先取10,后文介绍第二个参数
        for (String string : s) {
            System.out.println("子字符串"+string);
        }
        System.out.println(s.length);
    }

}

public class test {
    public static void main(String[] args) {
        String str = "1,2,3,4";
        String[] s = str.split(",",2);//这里输入limit为2,即分成2部分
        for (String string : s) {
            System.out.println("子字符串"+string);
        }
        System.out.println(s.length);
    }

}

public class test {
    public static void main(String[] args) {
        String str = "1,2,3,4,,,";// 这里后面逗号之间的空字符串将被丢弃
        String[] s = str.split(",",0);
        for (String string : s) {
            System.out.println("子字符串"+string);
        }
        System.out.println(s.length);
    }

}

public class test {
    public static void main(String[] args) {
        String str = ",1,2,3,4,";
        String[] s = str.split(",",-1);//limit值为负数
        for (String string : s) {
            System.out.println("子字符串"+string);
        }
        System.out.println(s.length);
    }

}