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import java.util.*; public class IdentityHashMapDemo { public static void main(String args[]) { IdentityHashMap ihm = new IdentityHashMap(); ihm.put("Zara", new Double(3434.34)); ihm.put("Mahnaz", new Double(123.22)); ihm.put("Ayan", new Double(1378.00)); ihm.put("Daisy", new Double(99.22)); ihm.put("Qadir", new Double(-19.08)); Set set = ihm.entrySet(); // 获取迭代器 Iterator i = set.iterator(); // 显示元素 while(i.hasNext()) { Map.Entry me = (Map.Entry)i.next(); System.out.print(me.getKey() + ": "); System.out.println(me.getValue()); } System.out.println(); // Deposit 1000 into Zara's account double balance = ((Double)ihm.get("Zara")).doubleValue(); ihm.put("Zara", new Double(balance + 1000)); System.out.println("Zara's new balance: " + ihm.get("Zara")); } }
运行结果 :
正在执行...
