package study; import java.util.HashMap; /** * @author shkstart * @date 2018/7/13 0013 - 下午 6:28 */ public class DebugTest { public static void main(String[] args){ for (int i = 0; i < 100; i++) { System.out.println(i); } HashMap map = new HashMap<>(); map.put("name","Tom"); map.put("age","12"); map.put("school","Tsinghua"); map.put("major","computer"); String age = map.get("age"); System.out.println("age = " + age); map.remove("major"); System.out.println(map); } }