1 package com.hangao.basic;
2
3 /**
4 * @author hangao hangao1204@hotmail.com
5 *
6 * continue 中断当前循环的当前次，继续当前循环的下一次（如果有），继续执行后面的代码
7 *
8 * break 中断当前循环的所有次，不再继续当前循环，继续外层嵌套循环的下一次（如果有），继续执行后面的代码
9 *
10 * return 中断所有循环,且不再执行后面的代码
11 *
12 * 威力 return > break > continue
13 */
14 public class TestBreakContinueReturn {
15 public static void main(String[] args) {
16 testReturn1();
17 testReturn2();
18 testContinue1();
19 testContinue2();
20 testBreak1();
21 testBreak2();
22 }
23
24 /**
25 * 运行结果：
26 * i value is 0
27 */
28 private static void testReturn1() {
29 for (int i = 0; i < 3; i++) {
30 if (i == 1){
31 return;//中断所有循环
32 }
33 System.out.println("i value is " + i);
34 }
35 System.out.println("TestBreakContinueReturn.testReturn1()");
36 }
37
38 /**
39 * 运行结果：
40 * i value is 0
41 */
42 private static void testReturn2() {
43 for (int j = 0; j < 3; j++) {
44 for (int i = 0; i < 3; i++) {
45 if (i == 1){
46 return;//中断所有循环
47 }
48 System.out.println("i value is " + i);
49 }
50 }
51 System.out.println("TestBreakContinueReturn.testReturn2()");
52 }
53
54 /**
55 * 运行结果：
56 * i value is 0
57 * i value is 2
58 * TestBreakContinueReturn.testContinue1()
59 */
60 private static void testContinue1() {
61 for (int i = 0; i < 3; i++) {
62 if (i == 1){
63 continue;//中断当前循环
64 }
65 System.out.println("i value is " + i);
66 }
67 System.out.println("TestBreakContinueReturn.testContinue1()");
68 }
69
70 /**
71 * 运行结果：
72 * i value is 0
73 * i value is 2
74 * i value is 0
75 * i value is 2
76 * i value is 0
77 * i value is 2
78 * TestBreakContinueReturn.testContinue2()
79 */
80 private static void testContinue2() {
81 for (int j = 0; j < 3; j++) {
82 for (int i = 0; i < 3; i++) {
83 if (i == 1){
84 continue;//中断当前循环
85 }
86 System.out.println("i value is " + i);
87 }
88 }
89 System.out.println("TestBreakContinueReturn.testContinue2()");
90 }
91
92 /**
93 * 运行结果：
94 * i value is 0
95 * TestBreakContinueReturn.testBreak1()
96 */
97 private static void testBreak1() {
98 for (int i = 0; i < 3; i++) {
99 if (i == 1){
100 break;//中断整个循环
101 }
102 System.out.println("i value is " + i);
103 }
104 System.out.println("TestBreakContinueReturn.testBreak1()");
105 }
106
107 /**
108 * 运行结果：
109 * i value is 0
110 * i value is 0
111 * i value is 0
112 * TestBreakContinueReturn.testBreak2()
113 */
114 private static void testBreak2() {
115 for (int j = 0; j < 3; j++) {
116 for (int i = 0; i < 3; i++) {
117 if (i == 1){
118 break;//中断当前整个循环
119 }
120 System.out.println("i value is " + i);
121 }
122 }
123 System.out.println("TestBreakContinueReturn.testBreak2()");
124 }
125 }
