java - for 循环15

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package com.demo.test;   public class circulate {     public static void main(String[] args) {         System.out.println();         f();     }     public static void f() {         for (int i=0 ;i<4;i++){             System.out.println("我跑！");         }     } }<br><br>package com.demo.test;<br><br>public class circulate {<br>    public static void main(String[] args) {<br>        System.out.println();<br>        f(9);<br>    }<br><br>    public static void f(int q) {<br>        for (int i = 0; i < q; i++) {<br>            System.out.println("我跑！"+i);<br>        }<br>    }<br>}<br><br><br><br><br>package com.demo.test;<br><br>public class circulate {<br>    public static void main(String[] args) {<br>        int res = sum();<br>        System.out.println("1-100偶数的和为：" + res);<br>        narcissus();<br>        cir();<br>        cf();<br>    }<br><br>    public static int sum() {<br>        int sum = 0;<br>        for (int i = 1; i <= 100; i++) {<br>            if (i % 2 == 0) {<br>                sum += i;<br>            }<br>        }<br>        return sum;<br>    }<br><br>    //    水仙花案例<br>    public static void narcissus() {<br>        for (int i = 100; i <= 999; i++) {<br>            int individual = i % 10;<br>            int ten = i / 10 % 10;<br>            int hundred = i / 100 % 10;<br>            if (individual * individual * individual + ten * ten * ten + hundred * hundred * hundred == i) {<br>                System.out.println(i);<br>            }<br>        }<br>    }<br><br>    //这个思路也可以拿去做<br>    public static void cir() {<br>        for (int i = 1; i <= 5; i++) {<br>            for (int j = 1; j <= i; j++) {<br>                System.out.print("*");<br>            }<br>            System.out.println();<br>        }<br>    }<br>//    乘法表<br>    public static void cf() {<br>        for (int i = 1; i <= 9; i++) {<br>            for (int j = 1; j <= i; j++) {<br>                System.out.print(j + "*" + i + "=" + j * i + "\t");<br>            }<br>            System.out.println();<br>        }<br>    }<br>}

 

 

 

　　和js的for循环没啥区别的，几个案例

 

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