java 基础之for循环

示例

import java.util.Scanner;

/*
For 循环结构的使用
1 .循环结构的4要素
（1）初始化条件
（2）循环条件（布尔类型）
（3）循环体
（4）迭代条件
2.for循环结构
for （1；2；4）{
    3；
}

 */
public class roftest {
    public static void main(String[] args) {
        for (int i = 1; i <= 2; i++) {
            System.out.println("hhh"+i);

        }
        int sum = 0;
        int t = 0;
        for (int i = 1; i <=100; i++ ){
            if (i % 2 == 0 ){
                sum += i;//表示sum=sum+i
                System.out.println(i);
                t++;
            }
        }
        System.out.println("100以内所有偶数的和为："+sum+" ,100以内有"+t+"个偶数。");

        for (int i = 1; i <= 150; i++){
            if (i%3==0&&i%5==0&&i%7==0){
                System.out.println(i+" foo biz  baz");
            }else if (i%3==0&&i%5==0){
                System.out.println(i+" foo biz");
            }else if (i%3==0&&i%7==0){
                System.out.println(i+" foo baz");
            }else if (i%5==0&&i%7==0){
                System.out.println(i+" biz baz");
            }else if (i%3==0) {
                System.out.println(i+" foo");
            }else if (i%5==0) {
                System.out.println(i+" biz");
            }else if (i%7==0){
                System.out.println(i+" baz");
            }
        }
        for (int i = 1; i <= 150; i++){
            System.out.print(i + " ");
            if (i%3 == 0 ) {
                System.out.print("foo ");  //print 不换行；println 自动换行
            }
            if (i%5 ==0) {
                System.out.print("biz ");
            }
            if (i%7 ==0 ){
                System.out.print("baz ");
            }
            System.out.println();
        }
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入第一个数：");
        int n = scan.nextInt();
        System.out.println("请输入第二个数：");
        int m = scan.nextInt();
        //获取最大公约数
        int min = ( m <= n ) ? m : n ;
        for (int i = min; i>=1 ; i--){
            if (m%i ==0 && n%i==0){
                System.out.println(i);
                break;
            }
        }
        //获取两个数最小公倍数
        int max = (m>=n)?m:n;
        for (int i = max; i<=n*m;i++){
            if (i%m==0&&i%n==0){
                System.out.println(i);
                break;
            }
        }
    }
}

　　测试

D:jdkjdk-8u131injava.exe "-javaagent:D:ideAIntelliJ IDEA 2019.3.3libidea_rt.jar=6031:D:ideAIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath D:jdkjdk-8u131jrelibcharsets.jar;D:jdkjdk-8u131jrelibdeploy.jar;D:jdkjdk-8u131jrelibextaccess-bridge-64.jar;D:jdkjdk-8u131jrelibextcldrdata.jar;D:jdkjdk-8u131jrelibextdnsns.jar;D:jdkjdk-8u131jrelibextjaccess.jar;D:jdkjdk-8u131jrelibextjfxrt.jar;D:jdkjdk-8u131jrelibextlocaledata.jar;D:jdkjdk-8u131jrelibext
ashorn.jar;D:jdkjdk-8u131jrelibextsunec.jar;D:jdkjdk-8u131jrelibextsunjce_provider.jar;D:jdkjdk-8u131jrelibextsunmscapi.jar;D:jdkjdk-8u131jrelibextsunpkcs11.jar;D:jdkjdk-8u131jrelibextzipfs.jar;D:jdkjdk-8u131jrelibjavaws.jar;D:jdkjdk-8u131jrelibjce.jar;D:jdkjdk-8u131jrelibjfr.jar;D:jdkjdk-8u131jrelibjfxswt.jar;D:jdkjdk-8u131jrelibjsse.jar;D:jdkjdk-8u131jrelibmanagement-agent.jar;D:jdkjdk-8u131jrelibplugin.jar;D:jdkjdk-8u131jrelib
esources.jar;D:jdkjdk-8u131jrelib
t.jar;G:java_ideachenxioutproductionchenxi com.chenxi.java.roftest
hhh1
hhh2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
98
100
100以内所有偶数的和为：2550 ,100以内有50个偶数。
3 foo
5 biz
6 foo
7 baz
9 foo
10 biz
12 foo
14 baz
15 foo biz
18 foo
20 biz
21 foo baz
24 foo
25 biz
27 foo
28 baz
30 foo biz
33 foo
35 biz baz
36 foo
39 foo
40 biz
42 foo baz
45 foo biz
48 foo
49 baz
50 biz
51 foo
54 foo
55 biz
56 baz
57 foo
60 foo biz
63 foo baz
65 biz
66 foo
69 foo
70 biz baz
72 foo
75 foo biz
77 baz
78 foo
80 biz
81 foo
84 foo baz
85 biz
87 foo
90 foo biz
91 baz
93 foo
95 biz
96 foo
98 baz
99 foo
100 biz
102 foo
105 foo biz  baz
108 foo
110 biz
111 foo
112 baz
114 foo
115 biz
117 foo
119 baz
120 foo biz
123 foo
125 biz
126 foo baz
129 foo
130 biz
132 foo
133 baz
135 foo biz
138 foo
140 biz baz
141 foo
144 foo
145 biz
147 foo baz
150 foo biz
1 
2 
3 foo 
4 
5 biz 
6 foo 
7 baz 
8 
9 foo 
10 biz 
11 
12 foo 
13 
14 baz 
15 foo biz 
16 
17 
18 foo 
19 
20 biz 
21 foo baz 
22 
23 
24 foo 
25 biz 
26 
27 foo 
28 baz 
29 
30 foo biz 
31 
32 
33 foo 
34 
35 biz baz 
36 foo 
37 
38 
39 foo 
40 biz 
41 
42 foo baz 
43 
44 
45 foo biz 
46 
47 
48 foo 
49 baz 
50 biz 
51 foo 
52 
53 
54 foo 
55 biz 
56 baz 
57 foo 
58 
59 
60 foo biz 
61 
62 
63 foo baz 
64 
65 biz 
66 foo 
67 
68 
69 foo 
70 biz baz 
71 
72 foo 
73 
74 
75 foo biz 
76 
77 baz 
78 foo 
79 
80 biz 
81 foo 
82 
83 
84 foo baz 
85 biz 
86 
87 foo 
88 
89 
90 foo biz 
91 baz 
92 
93 foo 
94 
95 biz 
96 foo 
97 
98 baz 
99 foo 
100 biz 
101 
102 foo 
103 
104 
105 foo biz baz 
106 
107 
108 foo 
109 
110 biz 
111 foo 
112 baz 
113 
114 foo 
115 biz 
116 
117 foo 
118 
119 baz 
120 foo biz 
121 
122 
123 foo 
124 
125 biz 
126 foo baz 
127 
128 
129 foo 
130 biz 
131 
132 foo 
133 baz 
134 
135 foo biz 
136 
137 
138 foo 
139 
140 biz baz 
141 foo 
142 
143 
144 foo 
145 biz 
146 
147 foo baz 
148 
149 
150 foo biz 
请输入第一个数：
12
请输入第二个数：
56
4
168

Process finished with exit code 0

　　输出满足个位十位个位数的立方和等于这个数的本身；例如153=1*1*1+5*5*5+3*3*3  

public class roftest {
    public static void main(String[] args) {

        for (int i= 100; i<1000;i++){
            int b=i/100;
            int s=i%100/10;
            int g=i%10;
            if (i == (b*b*b+s*s*s+g*g*g)) {
                System.out.println(i);
            }
        }

    }
}

　　测试

153
370
371
407