Question

编写一个Applet程序，从键盘输入一个整数，求出其阶乘。

Answer 1

import java.applet.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class test extends Applet implements ActionListener { Label lb1,lb2; TextField tf; Button btn; public void init() { lb1 = new Label("请输入一个整数:"); lb2 = new Label(" "); tf = new TextField(10); btn = new Button("判断"); setLayout(new FlowLayout()); add(lb1); add(tf); add(btn); add(lb2); btn.addActionListener(this); setSize(200,200); setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==btn) { StringBuffer source = new StringBuffer(tf.getText()); source.reverse(); String reverseString = new String(source); if(reverseString.equals(tf.getText())) lb2.setText(tf.getText()+"是回文!"); else lb2.setText(tf.getText()+"不是回文!"); } } }

满意请采纳