Java Vector removeElement()
Java Vector类的
removeElement()方法用于删除第一个(索引最低的)事件。此向量的参数。删除元素会使Vector 大小减小一。
语法
以下是
removeElement()方法的声明:
Public boolean removeElement(Object obj)
参数
| 参数 |
说明 |
必需/可选 |
| obj |
这是一个将从向量中删除的元素。 |
必需 |
返回
如果自变量是向量的组成部分，则
removeElement()方法返回true，否则返回false。
异常
NA
兼容版本
Java 1.2及更高版本
示例1
import java.util.*;
public class VectorRemoveElementExample1 {
public static void main(String arg[]) {
//Create an empty vector
Vector<Integer> vec = new Vector<>();
// Add elements in the vector
vec.add(1);
vec.add(2);
vec.add(3);
vec.add(4);
vec.add(5);
vec.add(6);
System.out.println("Vector element before removal: " + vec);
//Remove an element
vec.removeElement(5);
//Checking vector and displays the element
System.out.println("Vector element after removal: " + vec);
}
}
输出:
Vector element before removal: [1, 2, 3, 4, 5, 6]
Vector element after removal: [1, 2, 3, 4, 6]
示例2
import java.util.*;
public class VectorRemoveElementExample2 {
public static void main(String arg[]) {
//Create an empty Vector
Vector<String> vec = new Vector<>();
//Add elements to the Vector
vec.add("Rahul");
vec.add("Karan");
vec.add("Rahul");
vec.add("Rohan");
//Printing the elements of the Vector
System.out.println("The elements of a Vector before remove: "+vec);
//Removing the "Rahul" from the Vector
boolean b = vec.removeElement("Rahul");
System.out.println("Is the removal successful?? "+b);
//Printing the elements of the Vector
System.out.println("The elements of the Vector after remove: "+vec);
}
}
输出:
The elements of a Vector before remove: [Rahul, Karan, Rahul, Rohan]
Is the removal successful?? true
The elements of the Vector after remove: [Karan, Rahul, Rohan]
