control/LabeledFor.java · ThisYoung/OnJava8-Examples

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OnJava8-Examples

control

LabeledFor.java

LabeledFor.java 1.42 KB

// control/LabeledFor.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// For loops with "labeled break"/"labeled continue."

public class LabeledFor {
 public static void main(String[] args) {
 int i = 0;
 outer: // Can't have statements here
 for(; true ;) { // infinite loop
 inner: // Can't have statements here
 for(; i < 10; i++) {
 System.out.println("i = " + i);
 if(i == 2) {
 System.out.println("continue");
 continue;
 }
 if(i == 3) {
 System.out.println("break");
 i++; // Otherwise i never
 // gets incremented.
 break;
 }
 if(i == 7) {
 System.out.println("continue outer");
 i++; // Otherwise i never
 // gets incremented.
 continue outer;
 }
 if(i == 8) {
 System.out.println("break outer");
 break outer;
 }
 for(int k = 0; k < 5; k++) {
 if(k == 3) {
 System.out.println("continue inner");
 continue inner;
 }
 }
 }
 }
 // Can't break or continue to labels here
 }
}
/* Output:
i = 0
continue inner
i = 1
continue inner
i = 2
continue
i = 3
break
i = 4
continue inner
i = 5
continue inner
i = 6
continue inner
i = 7
continue outer
i = 8
break outer
*/

一键复制编辑原始数据按行查看历史

Bruce Eckel 提交于 2017年05月11日 01:45 +08:00 . Narrowed listing widths, fixed output

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

// control/LabeledFor.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// For loops with "labeled break"/"labeled continue."

public class LabeledFor {
 public static void main(String[] args) {
 int i = 0;
 outer: // Can't have statements here
 for(; true ;) { // infinite loop
 inner: // Can't have statements here
 for(; i < 10; i++) {
 System.out.println("i = " + i);
 if(i == 2) {
 System.out.println("continue");
 continue;
 }
 if(i == 3) {
 System.out.println("break");
 i++; // Otherwise i never
 // gets incremented.
 break;
 }
 if(i == 7) {
 System.out.println("continue outer");
 i++; // Otherwise i never
 // gets incremented.
 continue outer;
 }
 if(i == 8) {
 System.out.println("break outer");
 break outer;
 }
 for(int k = 0; k < 5; k++) {
 if(k == 3) {
 System.out.println("continue inner");
 continue inner;
 }
 }
 }
 }
 // Can't break or continue to labels here
 }
}
/* Output:
i = 0
continue inner
i = 1
continue inner
i = 2
continue
i = 3
break
i = 4
continue inner
i = 5
continue inner
i = 6
continue inner
i = 7
continue outer
i = 8
break outer
*/