Java中的堆栈addElement（E）方法与示例

Stack Class的addElement(E)方法用于将作为参数传递的元素附加到 Stack 末尾的此函数。

句法：

boolean addElement(E obj)

Here, E is the type of elements maintained 
by this container.

参数：此函数接受参数E obj ，它是要添加到堆栈末尾的对象。

返回值：如果至少执行了一个附加操作，则该方法返回True ，否则返回False 。

下面的程序说明了Java.util.Stack.addElement() 方法：

示例 1：

// Java code to illustrate boolean addElement()
  
import java.util.*;
import java.util.ArrayList;
  
public class GFG {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack stack = new Stack();
  
        // Use add() method to add elements in the Stack
        stack.add("Geeks");
        stack.add("for");
        stack.add("Geeks");
        stack.add("10");
        stack.add("20");
  
        // Displaying the Stack
        System.out.println("The Stack is: " + stack);
  
        // Appending "GeeksForGeeks" to the Stack
        stack.addElement("GeeksForGeeks");
  
        // Clearing the Stack using clear() and displaying
        System.out.println("The new Stack is: " + stack);
    }
}

输出：

The Stack is: [Geeks, for, Geeks, 10, 20]
The new Stack is: [Geeks, for, Geeks, 10, 20, GeeksForGeeks]

示例 2：

// Java code to illustrate
// boolean add(Object element)
  
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 in the Stack
        stack.add(10);
        stack.add(20);
        stack.add(30);
        stack.add(40);
        stack.add(50);
  
        // Displaying the Stack
        System.out.println("The Stack is: " + stack);
  
        // Appending 100 to the Stack
        stack.addElement(100);
  
        // Clearing the Stack using clear() and displaying
        System.out.println("The new Stack is: " + stack);
    }
}

输出：

The Stack is: [10, 20, 30, 40, 50]
The new Stack is: [10, 20, 30, 40, 50, 100]