removeAllElements() 方法在 java 中有什么作用?
removeAllElements() 方法用于移除此向量的所有分量,并将其大小设为零。此方法的功能与 clear 方法相同。
示例
import java.util.Vector; public class VectorDemo { public static void main(String[] args) { Vector<Integer> vec = new Vector<Integer>(4); vec.add(4); vec.add(3); vec.add(2); vec.add(1); System.out.println("Added numbers are :- "); for (Integer number : vec) { System.out.println("Number = " + number); } System.out.println("Size of the vector: "+vec.size()); System.out.println("Removing all elements"); vec.removeAllElements(); System.out.println("Now size of the vector: "+vec.size()); } }
输出
Added numbers are :- Number = 4 Number = 3 Number = 2 Number = 1 Size of the vector: 4 Removing all elements Now size of the vector: 0
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