# Java - 从`HashMap`中删除映射 > 原文： [https://beginnersbook.com/2014/07/java-remove-mapping-from-hashmap-example/](https://beginnersbook.com/2014/07/java-remove-mapping-from-hashmap-example/) #### 示例 在这个例子中，我们将看到如何使用键值对的键值从[`HashMap`](https://beginnersbook.com/2013/12/hashmap-in-java-with-example/)中删除特定的映射。我们将使用以下`HashMap`类方法来执行此操作： `public Value remove(Object key)`：从此映射中移除指定键的映射（如果存在），并返回该特定键的元素值。更多关于[`remove`方法 Javadoc](https://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html#remove(java.lang.Object))。 **完整代码：** ```java import java.util.HashMap; public class RemoveMappingExample { public static void main(String[] args) { // Creating a HashMap of int keys and String values HashMap<Integer, String> hashmap = new HashMap<Integer, String>(); // Adding Key and Value pairs to HashMap hashmap.put(11,"Value1"); hashmap.put(22,"Value2"); hashmap.put(33,"Value3"); hashmap.put(44,"Value4"); hashmap.put(55,"Value5"); hashmap.put(66,"Value6"); // Displaying HashMap Elements System.out.println("HashMap Elements: " + hashmap); // Removing Key-Value pairs for key 33 Object removedElement1 = hashmap.remove(33); System.out.println("Element removed is: " +removedElement1); // Removing Key-Value pairs for key 55 Object removedElement2 = hashmap.remove(55); System.out.println("Element removed is: " +removedElement2); // Displaying HashMap Elements after remove System.out.println("After Remove:"); System.out.println("--------------"); System.out.println("HashMap Elements: " + hashmap); } } ``` **输出：** ```java HashMap Elements: {33=Value3, 55=Value5, 66=Value6, 22=Value2, 11=Value1, 44=Value4} Element removed is: Value3 Element removed is: Value5 After Remove: -------------- HashMap Elements: {66=Value6, 22=Value2, 11=Value1, 44=Value4} ```