Java：break，continue，goto

package com.jiang.struct;

public class BreakDemo {
    public static void main(String[] args) {
        int i = 0;
        while (i < 100) {
            i++;
            System.out.println(i);
            if (i == 20) {
                break;
            }
        }
        System.out.println("123456");
    }
}

package com.jiang.struct;

public class ContinueDemo {
    public static void main(String[] args) {
    int i = 0;
    while (i<50){
        i++;
        if (i%10==0){
            System.out.println();
            continue;
        }
        System.out.println(i);
    }
    }
}

package com.jiang.struct;

public class LabelDemo {
    public static void main(String[] args) {
        //打印101~150之间所有的质数
        int count=0;

        //不建议使用!
        outer:for (int i=101;i<150;i++){
            for (int j=2;j