Java Stack removeAllElements()方法与实例

Java.util.Stack.removeAllElements() 方法用于删除该堆栈中的所有组件，并将其大小设为零。

语法

Stack.removeAllElements()

参数： 该方法不接受任何参数

返回值： 该函数不返回任何值。

下面的程序说明了Java.util.Stack.removeAllElements()方法。

例1:

// Java code to illustrate removeAllElements()
import java.util.*;
  
public class GFG {
    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("4");
        stack.add("Geeks");
  
        // Displaying the Stack
        System.out.println("Stack: " + stack);
  
        // removeAllElementsing the Stack
        // using removeAllElements() method
        stack.removeAllElements();
  
        // Displaying the final Stack after removeAllElementsing
        System.out.println("The final Stack: " + stack);
    }
}

输出：

Stack: [Welcome, To, Geeks, 4, Geeks]
The final Stack: []

例2 :

// Java code to illustrate removeAllElements()
import java.util.*;
  
public class GFG {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<Integer> stack = new Stack<Integer>();
  
        // Use add() method to add elements into the Queue
        stack.add(10);
        stack.add(15);
        stack.add(30);
        stack.add(20);
        stack.add(5);
  
        // Displaying the Stack
        System.out.println("Stack: " + stack);
  
        // removeAllElementsing the Stack
        // using removeAllElements() method
        stack.removeAllElements();
  
        // Displaying the final Stack after removeAllElementsing
        System.out.println("The final Stack: " + stack);
    }
}

输出：

Stack: [10, 15, 30, 20, 5]
The final Stack: []