Java Stack toArray()用法及代码示例

Java中Stack类的toArray()方法用于生成与Stack相同元素的数组。本质上，它将所有元素从堆栈复制到新数组。

用法:

Object[] arr = Stack.toArray()

参数：该方法不带任何参数。

返回值：该方法返回一个包含与Stack类似的元素的数组。

以下示例程序旨在说明Stack.toArray()方法：

示例1:

// Java code to illustrate toArray() 
  
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<String> stack = new Stack<String>(); 
  
        // Use add() method to add elements into the Stack 
        stack.add("Welcome"); 
        stack.add("To"); 
        stack.add("Geeks"); 
        stack.add("For"); 
        stack.add("Geeks"); 
  
        // Displaying the Stack 
        System.out.println("The Stack: " + stack); 
  
        // Creating the array and using toArray() 
        Object[] arr = stack.toArray(); 
  
        System.out.println("The array is:"); 
        for (int j = 0; j < arr.length; j++) 
            System.out.println(arr[j]); 
    } 
}

输出：

The Stack: [Welcome, To, Geeks, For, Geeks]
The array is:
Welcome
To
Geeks
For
Geeks

示例2:

// Java code to illustrate toArray() 
  
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<Integer> stack = new Stack<Integer>(); 
  
        // Use add() method to add elements into the Stack 
        stack.add(10); 
        stack.add(15); 
        stack.add(30); 
        stack.add(20); 
        stack.add(5); 
        stack.add(25); 
  
        // Displaying the Stack 
        System.out.println("The Stack: " + stack); 
  
        // Creating the array and using toArray() 
        Object[] arr = stack.toArray(); 
  
        System.out.println("The array is:"); 
        for (int j = 0; j < arr.length; j++) 
            System.out.println(arr[j]); 
    } 
}

输出：

The Stack: [10, 15, 30, 20, 5, 25]
The array is:
10
15
30
20
5
25

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注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 Stack toArray() method in Java with Example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。