Java Vector removeAllElements()
Java向量类的
removeAllElements()方法用于从向量中删除所有元素并设置大小向量为零。
语法
以下是
removeAllElements()方法的声明:
Public void removeAllElements()
参数
此方法不接受任何参数。
返回
此方法具有返回类型
无效，因此它不会返回任何内容。
异常
NA
兼容性版本
Java 1.2及更高版本
示例1
import java.util.Vector;
public class VectorRemoveAllElementsExample1 {
public static void main(String arg[]) {
//Create an empty Vector
Vector<String> vc = new Vector<>();
//Add elements in the vector by using add() method
vc.add("A");
vc.add("B");
vc.add("C");
//Print the size of vector
System.out.println("Size of Vector before removeAllElements() method: "+vc.size());
//removeAllElements from the vector
vc.removeAllElements();
System.out.println("Size of Vector after removeAllElements() method: "+vc.size());
}
}
输出:
Size of Vector before removeAllElements() method: 3
Size of Vector after removeAllElements() method: 0
示例2
import java.util.Vector;
public class VectorRemoveAllElementsExample2 {
public static void main(String arg[]) {
//Create an empty Vector with initial capacity of 5
Vector<Integer> vecObject = new Vector<Integer>(5);
//Add values in the vector
vecObject.add(3);
vecObject.add(5);
vecObject.add(2);
vecObject.add(4);
vecObject.add(1);
System.out.println("Elements of Vector is: "+vecObject);
//removeAllElements from the vector
vecObject.removeAllElements();
//Display the vector elements
System.out.println("Elements of Vector after removeAllElements(): "+vecObject);
System.out.println("Size of Vector after removeAllElements() method: "+vecObject.size());
}
}
输出:
Elements of Vector is: [3, 5, 2, 4, 1]
Elements of Vector after removeAllElements(): []
Size of Vector after removeAllElements() method: 0
