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import java.util.HashMap;
import java.util.Map;
public class Main {
public static void main(String[] a) {
Map<String,String> map = new HashMap<String,String>();
map.put("key1", "value1");
map.put("key2", "value2");
map.put("key3", "value3");
System.out.println(map.containsKey("key1"));
System.out.println(map.containsValue("value2"));
}
}
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