從 Java 中的堆疊中移除元素
可以使用 java.util.Stack.pop() 方法從堆疊中移除元素。此方法不需要任何引數,它將移除堆疊頂部的元素。它將返回已移除的元素。
以下給出了演示此功能的程式 −
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); } }
輸出
The stack elements are: [Apple, Mango, Guava, Pear, Orange] The element that was popped is: Orange The stack elements are: [Apple, Mango, Guava, Pear]
現在讓我們瞭解上述程式。
建立堆疊。然後使用 Stack.push() 方法將元素新增到堆疊。顯示堆疊。以下程式碼片段演示了此操作 −
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() 方法用於移除堆疊的頂部元素並顯示它。然後再次顯示堆疊。以下程式碼片段演示了此操作 −
System.out.println("The element that was popped is: " + stack.pop()); System.out.println("The stack elements are: " + stack);
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