import java.util.HashMap;
public class Main {
public static void main(String[] args) {
HashMap<String,String> hMap = new HashMap<String,String>();
hMap.put("1", "One");
hMap.put("2", "Two");
hMap.put("3", "Three");
Object obj = hMap.remove("2");
System.out.println(obj + " Removed from HashMap");
}
}
运行结果如下:
Remove all values from HashMap
/*w w w . jav a 2s .c o m*/
import java.util.HashMap;
public class Main {
public static void main(String[] args) {
HashMap<String,String> hMap = new HashMap<String,String>();
hMap.put("1", "One");
hMap.put("2", "Two");
hMap.put("3", "Three");
hMap.clear();
System.out.println(hMap.size());
}
}
运行结果如下:
【map】
