Javaç¨åºï¼
import java.util.ArrayList;
import java.util.List;
public class Main {
public static void main(String[] args) {
List<String> list = new ArrayList<String>();
list.add("James");
list.add("White");
list.add("Smith");
list.add("Michael");
String key = "Smith";
if(exists(list, key)) {
System.out.println(key + " å¨éåä¸åå¨");
}
else {
System.out.println(key + " å¨éåä¸ä¸åå¨");
}
}
/**
* å¤æéåä¸æ¯å¦åå¨æå®çå符串
* @param list å符串éå
* @param key å¾
æ¥æ¾å符串
* @return éåä¸æ¯å¦åå¨æå®çå符串ï¼trueï¼åå¨ï¼falseï¼ä¸åå¨
*/
public static boolean exists(List<String> list, String key) {
for(String str : list) {
if(str.equals(key)) {
return true;
}
}
return false;
}
}
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Smith å¨éåä¸åå¨