import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.Map; import java.util.Set; public class Demo { public static void main(String[] args) { HashMap<String,String>map = new HashMap<String,String>(); map.put("1", "A"); map.put("2", "B"); map.put("3", "C"); map.put("4", "D"); map.put("5", "E"); map.put("6", "F"); map.put("7", "G"); map.put("8", "H"); map.put("9", "I"); System.out.println("HashMap..."); for (String res: map.keySet()) { System.out.println(res); } map.remove("5"); System.out.println("Updated HashMap..."); for (String res: map.keySet()) { System.out.println(res); } map.remove("8"); System.out.println("Updated HashMap..."); for (String res: map.keySet()) { System.out.println(res); } } }
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