用户图形设计界面之信息登记

import java.awt.*;
public class loginframe extends Frame {
public loginframe()
{
 super("user login");
 this.setSize(1000, 1000);
 this.setLocation(300, 240);
 this.setBackground(Color.black);
 this.setLayout(new FlowLayout());
 
 
 this.add(new Label("name:weixiao"));
 this.add(new TextField("name:weixiao",10));
 this.add(new Label("sex:f"));
 this.add(new TextField("sex:f",10));
 this.add(new Label("学号 20163311124"));
 this.add(new TextField("学号 20163311124",30));
 this.add(new Label("联系方式：5888888"));
 this.add(new TextField("联系方式：5888888",30));
 this.add(new Label("地址：河南"));
 this.add(new TextField("地址：河南",10));

 

 this.add(new Button("ok"));
 this.add(new Button("cancle"));
 this.setVisible(true);
 
}
public static void main(String arg[])
{
 new loginframe();
}
}

 

 

 

简易计算器

 

package 计算器;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class jisuanqi extends JFrame {
 private static final long serialVersionUID = 1L;
 private StringBuilder sBuilder = new StringBuilder();
  
  private Double a;//中间变量用于存储输入的第一个数
  private Double b;//中间变量，用于存储输入的第二个数
  private Double double1;//用于接收计算结果
  private Integer i;// i用于表示加减乘除

//构造函数
  public jisuanqi() {
  this.setTitle("计算器");
  this.setSize(318, 457);
  this.setLocationRelativeTo(null);//窗口置于屏幕中央
  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  JPanel panel = new JPanel();//
  this.getContentPane().add(panel);
  panel.setLayout(null);

  // 定义一个label用于显示输入数据和计算结果，这里不用textfield，可以避免用户输入造成bug，简化程序开发
  final JLabel label = new JLabel();
  label.setBounds(0, 0, 300, 50);
  label.setFont(new Font("dialog", 1, 30));
  label.setOpaque(true);// 由于jlabel默认透明，直接设置背景色无效，需要先将不透明设置为true
  label.setBackground(Color.white);
  panel.add(label);

  // 定义按钮组件
  JButton button1 = new JButton("1");
  JButton button2 = new JButton("2");
  JButton button3 = new JButton("3");
  JButton button4 = new JButton("4");
  JButton button5 = new JButton("5");
  JButton button6 = new JButton("6");
  JButton button7 = new JButton("7");
  JButton button8 = new JButton("8");
  JButton button9 = new JButton("9");
  JButton button0 = new JButton("0");
  JButton buttonadd = new JButton("+");// 加
  JButton buttonminus = new JButton("-");// 减
  JButton buttontime = new JButton("×");// 乘
  JButton buttondivid = new JButton("÷");// 除
  JButton buttonequal = new JButton("=");// 等于
  JButton buttondecimal = new JButton(".");// 小数点
  JButton buttondelet = new JButton("←");// 删除
  JButton buttonclear = new JButton("C");// 清除

  // 定义按钮组件位置
  button0.setBounds(0, 50, 100, 60);
  button0.setFont(new Font("dialog", 1, 30));
  panel.add(button0);
  button1.setBounds(100, 50, 100, 60);
  button1.setFont(new Font("dialog", 1, 30));
  panel.add(button1);
  button2.setBounds(200, 50, 100, 60);
  button2.setFont(new Font("dialog", 1, 30));
  panel.add(button2);
  button3.setBounds(0, 110, 100, 60);
  button3.setFont(new Font("dialog", 1, 30));
  panel.add(button3);
  button4.setBounds(100, 110, 100, 60);
  button4.setFont(new Font("dialog", 1, 30));
  panel.add(button4);
  button5.setBounds(200, 110, 100, 60);
  button5.setFont(new Font("dialog", 1, 30));
  panel.add(button5);
  button6.setBounds(0, 170, 100, 60);
  button6.setFont(new Font("dialog", 1, 30));
  panel.add(button6);
  button7.setBounds(100, 170, 100, 60);
  button7.setFont(new Font("dialog", 1, 30));
  panel.add(button7);
  button8.setBounds(200, 170, 100, 60);
  button8.setFont(new Font("dialog", 1, 30));
  panel.add(button8);
  button9.setBounds(0, 230, 100, 60);
  button9.setFont(new Font("dialog", 1, 30));
  panel.add(button9);
  buttonadd.setBounds(100, 230, 100, 60);
  buttonadd.setFont(new Font("dialog", 1, 30));
  panel.add(buttonadd);//加
  buttonminus.setBounds(200, 230, 100, 60);
  buttonminus.setFont(new Font("dialog", 1, 30));
  panel.add(buttonminus);//减
  buttontime.setBounds(0, 290, 100, 60);
  buttontime.setFont(new Font("dialog", 1, 30));
  panel.add(buttontime);//乘
  buttondivid.setBounds(100, 290, 100, 60);
  buttondivid.setFont(new Font("dialog", 1, 30));
  panel.add(buttondivid);//除
  buttonequal.setBounds(200, 290, 100, 60);
  buttonequal.setFont(new Font("dialog", 1, 30));
  panel.add(buttonequal);//等于
  buttondecimal.setBounds(0, 350, 100, 60);
  buttondecimal.setFont(new Font("dialog", 1, 30));
  panel.add(buttondecimal);//小数点
  buttonclear.setBounds(100, 350, 100, 60);
  buttonclear.setFont(new Font("dialog", 1, 30));
  panel.add(buttonclear);//复位
  buttondelet.setBounds(200, 350, 100, 60);
  buttondelet.setFont(new Font("dialog", 1, 30));
  panel.add(buttondelet);//删除

  // 给各个按钮设置动作监听器
  // 输入数值操作0~9
  button0.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("0");//添加数据(数据必须可为任何类型 string,int,bool…皆可)

  label.setText(sBuilder.toString());//必须以string型输出,输出结果为 123456
  }
  });
  button1.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("1");
  label.setText(sBuilder.toString());
  }
  });
  button2.addActionListener(new ActionListener() {

  @Override
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("2");
  label.setText(sBuilder.toString());
  }
  });
  button3.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("3");
  label.setText(sBuilder.toString());
  }
  });
  button4.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("4");
  label.setText(sBuilder.toString());
  }
  });
  button5.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("5");
  label.setText(sBuilder.toString());
  }
  });
  button6.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("6");
  label.setText(sBuilder.toString());
  }
  });
  button7.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("7");
  label.setText(sBuilder.toString());
  }
  });
  button8.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("8");
  label.setText(sBuilder.toString());
  }
  });
  button9.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append("9");
  label.setText(sBuilder.toString());
  }
  });

  // 输入运算符操作，需要先判断a是否为0.0
  buttonadd.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  a = Double.parseDouble(sBuilder.toString());
  sBuilder = new StringBuilder();
  label.setText("+");
  i = 0;
  }
  });
  buttonminus.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  a = Double.parseDouble(sBuilder.toString());
  sBuilder = new StringBuilder();
  label.setText("-");
  i = 1;
  }
  });
  buttontime.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  a = Double.parseDouble(sBuilder.toString());
  sBuilder = new StringBuilder();
  label.setText("×");
  i = 2;
  }
  });
  buttondivid.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  a = Double.parseDouble(sBuilder.toString());
  sBuilder = new StringBuilder();
  label.setText("÷");
  i = 3;
  }
  });
  buttonequal.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  // 该判断中间变量是否为空
  if (!"".equals(sBuilder.toString()) && (!(a == 0.0))) {
  b = Double.parseDouble(sBuilder.toString());
  if (i == 0) {
  double1 = a + b;
  label.setText(double1.toString());
  sBuilder = new StringBuilder();
  sBuilder.append(double1);
  } else if (i == 1) {
  double1 = a - b;
  label.setText(double1.toString());
  sBuilder = new StringBuilder();
  sBuilder.append(double1);
  } else if (i == 2) {
  double1 = a * b;
  label.setText(double1.toString());
  sBuilder = new StringBuilder();
  sBuilder.append(double1);
  } else if (i == 3) {
  double1 = a / b;
  label.setText(double1.toString());
  sBuilder = new StringBuilder();
  sBuilder.append(double1);
  } else {
  label.setText(sBuilder.toString());
  }
  }
  }
  });
  buttondecimal.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder.append(".");
  label.setText(sBuilder.toString());
  }
  });
  buttonclear.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  sBuilder = new StringBuilder();
  label.setText("");
  }
  });
  buttondelet.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  if (!"".equals(sBuilder.toString())) {
  sBuilder.deleteCharAt(sBuilder.length() - 1);
  label.setText(sBuilder.toString());
  }
  }
  });

  this.setVisible(true);
  }

 public static void main(String[] args) {
  new jisuanqi();
 }

}