Java中的Stack toArray()方法示例
在Java的Stack类中,toArray()方法用于形成一个与Stack中相同元素的数组。基本上,它将从一个Stack复制所有元素到一个新的数组中。
语法:
Object[] arr = Stack.toArray()
参数: 此方法不带任何参数。
返回值: 该方法返回一个包含与Stack相似的元素的数组。
下面的程序演示Stack.toArray()方法:
程序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]);
}
}
The Stack: [Welcome, To, Geeks, For, Geeks]
The array is:
Welcome
To
Geeks
For
Geeks
程序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]);
}
}
The Stack: [10, 15, 30, 20, 5, 25]
The array is:
10
15
30
20
5
25