📜  Java中的 Stack toArray() 方法示例

📅  最后修改于: 2022-05-13 01:54:51.673000             🧑  作者: Mango

Java中的 Stack toArray() 方法示例

Java中Stack 类toArray()方法用于组成与 Stack 相同元素的数组。基本上,它将堆栈中的所有元素复制到一个新数组中。

句法:

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类似于堆栈的元素的数组。

下面的程序说明了 Stack.toArray() 方法:

方案一:

// Java code to illustrate toArray()
  
import java.util.*;
  
public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack stack = new Stack();
  
        // 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

方案二:

// Java code to illustrate toArray()
  
import java.util.*;
  
public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack stack = new Stack();
  
        // 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