Java 中的栈 pop()方法
Java 中的 Java.util.Stack.pop()方法用于从堆栈中弹出一个元素。元素从堆栈顶部弹出，并从堆栈中移除。 语法:
STACK.pop()
参数:该方法不取任何参数。 返回值:这个方法返回堆栈顶部的元素，然后移除它。 异常:该方法抛出 EmptyStackException 如果堆栈为空则抛出。 下面的程序说明了 Java.util.Stack.pop()方法: 程序 1:
Java 语言(一种计算机语言，尤用于创建网站)
// Java code to illustrate pop()
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
STACK.push("Welcome");
STACK.push("To");
STACK.push("Geeks");
STACK.push("For");
STACK.push("Geeks");
// Displaying the Stack
System.out.println("Initial Stack: " + STACK);
// Removing elements using pop() method
System.out.println("Popped element: " +
STACK.pop());
System.out.println("Popped element: " +
STACK.pop());
// Displaying the Stack after pop operation
System.out.println("Stack after pop operation "
+ STACK);
}
}
程序 2:
Java 语言(一种计算机语言，尤用于创建网站)
// Java code to illustrate pop()
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
STACK.push(10);
STACK.push(15);
STACK.push(30);
STACK.push(20);
STACK.push(5);
// Displaying the Stack
System.out.println("Initial Stack: " + STACK);
// Removing elements using pop() method
System.out.println("Popped element: " +
STACK.pop());
System.out.println("Popped element: " +
STACK.pop());
// Displaying the Stack after pop operation
System.out.println("Stack after pop operation "
+ STACK);
}
}
Output:
Initial Stack: [10, 15, 30, 20, 5]
Popped element: 5
Popped element: 20
Stack after pop operation [10, 15, 30]
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