求助：极其简单的java程序

来源：百度知道 编辑：UC知道 时间：2024/06/25 11:44:02
8、编写一个具有可以计算两个整数的加、减、乘、除运算的计算器。

9、使用多线程概念编写一个程序，每隔一分钟显示当前的时间。
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//＃＃＃＃＃＃＃＃＃计算器＃＃＃＃＃
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseMotionListener;
import java.text.DecimalFormat;
import javax.swing.*;

public class 计数器_一般 extends JFrame implements ActionListener {
private JButton an[];

private JButton qingkong;

private JTextField k;

private JPanel rq1, rq2;

private String string[] = { "7", "8", "9", "/", "6", "5", "4", "*", "3",
"2", "1", "-", "0", ".", "=", "+" };

private String s = "", shu1 = "", shu2 = "", shu3 = "";

private static int fo = 0;

private boolean ff = tru