Java Vector set()用法及代碼示例

Java.util.Vector.set()方法用於將使用Vector類創建的向量中的任何特定元素替換為另一個元素。

用法:

Vector.set(int index, Object element)

參數：該函數接受兩個強製性參數，如上麵的語法所示和下麵的描述。

index：這是整數類型，是指要從向量中替換的元素的位置。
element：這是將替換現有元素的新元素，並且具有與vector相同的對象類型。

返回值：該方法從向量中返回被新值替換的先前值。

以下示例程序旨在說明Java.util.Vector.set()方法：

示例1:

// Java code to illustrate set() 
import java.util.*; 
  
public class VectorDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Vector 
        Vector<String> vec_tor = new Vector<String>(); 
  
        // Use add() method to add elements in the vector 
        vec_tor.add("Geeks"); 
        vec_tor.add("for"); 
        vec_tor.add("Geeks"); 
        vec_tor.add("10"); 
        vec_tor.add("20"); 
  
        // Displaying the Vector 
        System.out.println("Vector: " + vec_tor); 
  
        // Using set() method to replace Geeks with GFG 
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(2, "GFG")); 
  
        // Using set() method to replace 20 with 50 
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(4, "50")); 
  
        // Displaying the modified vector 
        System.out.println("The new Vector is:" + vec_tor); 
    } 
}

輸出：

Vector: [Geeks, for, Geeks, 10, 20]
The Object that is replaced is: Geeks
The Object that is replaced is: 20
The new Vector is:[Geeks, for, GFG, 10, 50]

示例2:

// Java code to illustrate set() 
import java.util.*; 
  
public class VectorDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Vector 
        Vector<Integer> vec_tor = new Vector<Integer>(); 
  
        // Use add() method to add elements in the vector 
        vec_tor.add(12); 
        vec_tor.add(23); 
        vec_tor.add(22); 
        vec_tor.add(10); 
        vec_tor.add(20); 
  
        // Displaying the Vector 
        System.out.println("Vector: " + vec_tor); 
  
        // Using set() method to replace 12 with 21 
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(0, 21)); 
  
        // Using set() method to replace 20 with 50 
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(4, 50)); 
  
        // Displaying the modified vector 
        System.out.println("The new Vector is:" + vec_tor); 
    } 
}

輸出：

Vector: [12, 23, 22, 10, 20]
The Object that is replaced is: 12
The Object that is replaced is: 20
The new Vector is:[21, 23, 22, 10, 50]

相關用法

注：本文由純淨天空篩選整理自kundankumarjha大神的英文原創作品 Vector set() Method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。