Java Stack toArray()方法及实例
Java中Stack类的 toArray() 方法是用来形成一个与Stack相同元素的数组的。基本上,它将所有的元素从一个堆栈复制到一个新的数组中。
语法
Object[] arr = Stack.toArray()
参数: 该方法不接受任何参数。
返回值: 该方法返回一个包含类似于Stack的元素的数组。
下面的程序说明了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]);
}
}
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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