从Java中的堆栈中删除元素
可以使用java.util.Stack.pop()方法从堆栈中删除元素。此方法不需要任何参数，并且会删除堆栈顶部的元素。它返回被删除的元素。
演示此的程序如下所示-
示例
import java.util.Stack;
public class Demo {
public static void main (String args[]) {
Stack stack = new Stack();
stack.push("Apple");
stack.push("Mango");
stack.push("Guava");
stack.push("Pear");
stack.push("Orange");
System.out.println("The stack elements are: " + stack);
System.out.println("The element that was popped is: " + stack.pop());
System.out.println("The stack elements are: " + stack);
}
}输出结果
The stack elements are: [Apple, Mango, Guava, Pear, Orange] The element that was popped is: Orange The stack elements are: [Apple, Mango, Guava, Pear]
现在让我们了解上面的程序。
堆栈已创建。然后使用Stack.push()方法将元素添加到堆栈中。显示堆栈。演示这的代码片段如下-
Stack stack = new Stack();
stack.push("Apple");
stack.push("Mango");
stack.push("Guava");
stack.push("Pear");
stack.push("Orange");
System.out.println("The stack elements are: " + stack);Stack.pop()方法用于删除堆栈的顶部元素并显示它。然后再次显示堆栈。演示这的代码片段如下-
System.out.println("The element that was popped is: " + stack.pop());
System.out.println("The stack elements are: " + stack);