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                # 從 Java 中的`Vector`中刪除所有元素 > 原文: [https://beginnersbook.com/2014/06/remove-all-elements-from-vector-in-java-example/](https://beginnersbook.com/2014/06/remove-all-elements-from-vector-in-java-example/) 在這個例子中,我們將看到如何從`Vector`中刪除所有元素。我們將使用`Vector`類的[`clear()`方法](https://docs.oracle.com/javase/7/docs/api/java/util/Vector.html#clear())來做到這一點。 `public void clear()`:刪除此`Vector`中的所有元素。此方法調用后,`Vector`將為空。 #### 示例 這里我們在調用`clear()`方法之前和之后顯示`Vector`的大小。步驟如下: 1)創建一個`Vector`。 2)添加元素。 3)調用`clear()`方法刪除所有元素。 ```java import java.util.Vector; public class RemoveAll { public static void main(String[] args) { // Creating a Vector of Strings Vector<String> vector = new Vector<String>(); //Adding elements to the Vector vector.add("C++"); vector.add("Java"); vector.add("Cobol"); vector.add("C"); vector.add("Oracle"); System.out.println("Current size of Vector: "+vector.size()); // Calling clear() method of Vector API vector.clear(); System.out.println("Size of Vector after clear(): "+vector.size()); } } ``` **輸出:** ```java Current size of Vector: 5 Size of Vector after clear(): 0 ```
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