Java中的 Stack toArray() 方法示例
Java中Stack 类的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