/*标签是为循环设计的，是为了在多重循环中方便的使用 break 和coutinue

*在循环中使用 break 或 continue 循环时跳到指定的标签处

*/

public class LabelTest {

public static void main(String[] args) {

String strSearch = "This is the string in which you have to search for a substring.";

String substring = "substring";

boolean found = false;

int max = strSearch.length() - substring.length();

testlbl:

for (int i = 0; i <= max; i++) {

int length = substring.length();

int j = i;

int k = 0;

while (length-- != 0) {

if(strSearch.charAt(j++) != substring.charAt(k++)){

continue testlbl;

}

}

found = true;

break testlbl;

}

if (found) {

System.out.println("发现子字符串。");

}

else {

System.out.println("字符串中没有发现子字符串。");

}

}

}