使用get()方法获取与给定键关联的值。
这是我们的HashMap及其元素-
// Create a hash map HashMap hm = new HashMap(); // Put elements to the map hm.put("Bag", new Integer(1100)); hm.put("Sunglasses", new Integer(2000)); hm.put("Frames", new Integer(800)); hm.put("Wallet", new Integer(700)); hm.put("Belt", new Integer(600));
获取相关值。键被设置为这样的参数-
hm.get("Frames")
上面的键是Frames,我们正在获取与其关联的值。
以下是获取与Java HashMap中的给定键关联的值的示例-
import java.util.*; public class Demo { public static void main(String args[]) { // Create a hash map HashMap hm = new HashMap(); // Put elements to the map hm.put("Bag", new Integer(1100)); hm.put("Sunglasses", new Integer(2000)); hm.put("Frames", new Integer(800)); hm.put("Wallet", new Integer(700)); hm.put("Belt", new Integer(600)); // Get a set of the entries Set set = hm.entrySet(); System.out.println("Elements in HashMap..."); // Get an iterator Iterator i = set.iterator(); // Display elements while(i.hasNext()) { Map.Entry me = (Map.Entry)i.next(); System.out.print(me.getKey() + ": "); System.out.println(me.getValue()); } System.out.println(); System.out.println("The value for key Frames in the HashMap = "+hm.get("Frames")); } }
输出结果
Elements in HashMap... Frames: 800 Belt: 600 Wallet: 700 Bag: 1100 Sunglasses: 2000 The value for key Frames in the HashMap = 800