java幾個簡單的循環

1.增強for循環

java5引入了主要用於數組的增強型for循環。

public class forEnhanced {
    public static void main(String[] arys){
        int[] numbers = {1,2,3,4,5};
        for (int x : numbers){
            System.out.println(x);
        }
        String[] names = {"Tome","Jone","liHua","xiaoMing","geGe"};
        for (String x : names){
            System.out.println(x);
        }
    }
}

2.簡單的for循環：

public class forDemo {
    public static void main(String[] args){
        for (int x=0;x<20;x++){
            System.out.println("value of x:"+x);
        }
    }
}

3.簡單的while循環：

public class whileDemo {
    public static void main(String[] arys){
        int x = 10;
        while (x<20){
            System.out.println("value of x:" + x);
            x++;
        }
    }
}

4.java關鍵字continue

public class continueDemo {
    public static void main(String[] args){
        int[] numbers={1,2,3,4,5};
        for (int x : numbers){
            if (x == 3){
            continue;
            }
            System.out.println("x:"+x);
        }
    }
}

5.java關鍵字break:

public class breakDome {
    public static void main(String[] arys){
        int[] numbers = {1,2,3,4,5};
        for (int x : numbers){
            if (x == 3){
                break;
            }
            System.out.println(x);
        }
    }
}

結果對於大家來說肯定都知道是啥啦。如果有不知道答案的，直接拷貝運行即可。