实验三 Java图形用户界面设计.doc

实验报告课程名称：Java程序设计 实验项目：实验三Java图形用户界面设计系别_理学院_专业/班级_信计1302_姓名_ _实验日期_ _2015.5.5_成绩_指导教师_ _一、实验题目： 实验三 Java 图形用户界面二、实验内容：（1）创建一个窗口1）窗口有标题“Exercise2）在窗口内从文本框输入用户名，密码，并选择”确定“按钮。如果用户名为“abc”，密码为“123”，则提示“用户名密码正确”，否则输入”用户名或密码错误“。（2）创建一个窗口1）窗口有“退出”菜单，选择后可退出程序窗口内有“提示”菜单，单击后弹出信息框，显示自己的班级、学号、姓名2）在窗口内实现一个贷款计算器，程序，从键盘上输入年利率、贷款额、贷款年数，输出月还款额以及总的还款额。要求： 1） 创建贷款类来模拟贷款的属性和行为，如具有年利率、贷款年限、贷款额等属性，以及计算月利率、计算月还款额、总还款额等行为。 2） 创建实际的应用类（包含main方法），生成图形界面，并调用贷款类的功能。 三、程序清单及结果：（需要标明实现程序对应的实验内容，并给出合理的程序注释及运行结果）1.1）程序清单及注释import javax.swing.*;import java.awt.event.*;import java.awt.*;public class land extends JFrame implements ActionListenerJTextField username = new JTextField(15);/定义用户名JPasswordField password = new JPasswordField(15);/定义密码JButton ok = new JButton(确定);/定义按钮JLabel messLabel = new JLabel( );/定义显示框GridBagLayout gridbag = new GridBagLayout();/定义布局public land()super(Exercise);/标题setSize(250,200);/窗口大小setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/退出方式JLabel usernameLabel = new JLabel(姓名：);/定义姓名：JLabel passwordLabel = new JLabel(密码：);/定义密码：ok.addActionListener(this);/确定按钮的动作GridBagConstraints constraints;setLayout(gridbag);addComponent(usernameLabel,0,0,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);/依次加入各个部件addComponent(username,1,0,5,1,40,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(passwordLabel,0,1,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);/依次加入各个部件addComponent(password,1,1,5,1,40,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(messLabel,1,2,1,1,100,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);/依次加入各个部件addComponent(ok,1,3,3,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);setVisible(true);/显示粗来public void actionPerformed(ActionEvent evt)/按钮的动作String user = abc;/用户名Object source = evt.getSource();char pass = password.getPassword();/密码if (source =ok)if(username.getText().equals(user) & isPasswordCorrect(pass)/如果用户名和密码正确messLabel.setText(用户名密码正确);elsemessLabel.setText(用户名密码错误);repaint();/重绘private static boolean isPasswordCorrect(char inputPassword) /验证密码char actualPassword = 1, 2, 3 ;/真实的密码if (inputPassword.length != actualPassword.length)/判断长度是否相同return false; / 长度不同，密码错误for (int i = 0; iinputPassword.length; i+)if (inputPasswordi != actualPasswordi)/挨个比较return false;/有不一样的就退出return true;private void addComponent(Component component , int gridx, int gridy, int gridwidth, int gridheight ,int weightx, int weighty, int fill, int anchor)GridBagConstraints constraints = new GridBagConstraints();constraints.gridx = gridx;constraints.gridy = gridy;constraints.gridwidth = gridwidth;constraints.gridheight = gridheight;constraints.weightx = weightx;constraints.weighty = weighty;constraints.fill = fill;constraints.anchor = anchor;gridbag.setConstraints(component, constraints);add(component);public static void main(String args)land ts = new land();2）程序运行结果2.1） 程序清单及注释import java.awt.*;import java.awt.event.*;import javax.swing.*;public class LoanCalculator extends JFrame implements ActionListener ,FocusListener/按钮JButton quit = new JButton(退出);JButton tip = new JButton(提示);/文本框JTextField annualratetext = new JTextField(4);/年利率JTextField yeartext = new JTextField(4);/贷款年限JTextField loantext = new JTextField(4);/贷款额JTextField monthrepaytext = new JTextField(4);/月还款额JTextField totalrepaytext = new JTextField(4);/总还款额GridBagLayout gridbag = new GridBagLayout();/定义布局class Loan/定义贷款类float annualrate;float year;float loan;float monthrepay;float totalrepay;Loan(float a,float y, float l)/构造函数annualrate=a;year=y;loan=l;monthrepay=0;totalrepay=l;for (int i=0;iyear;i+)totalrepay=(1+annualrate)*totalrepay;/计算monthrepay=totalrepay/12/year;public float getMonthrepay()/月还款额接口return monthrepay;public float getTotalrepay()/总还款额接口return totalrepay;public LoanCalculator()super(贷款计算器);/标题setSize(250,200);/窗口大小setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/退出方式/确定按钮的动作quit.addActionListener(this);tip.addActionListener(this);/用户输入annualratetext.addFocusListener(this);yeartext.addFocusListener(this);loantext.addFocusListener(this);/页面布局设置GridBagConstraints constraints;setLayout(gridbag);/输出项不可编辑monthrepaytext.setEditable(false);totalrepaytext.setEditable(false);/标签JLabel annualrateLabel = new JLabel( 年利率);/年利率JLabel yearLabel = new JLabel(贷款年限 );/贷款年限JLabel loanLabel = new JLabel( 贷款额);/贷款额JLabel monthrepayLabel = new JLabel(月还款额 );/月还款额JLabel totalrepayLabel = new JLabel(总还款额);/总还款额/设计布局addComponent(annualrateLabel,0,0,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(annualratetext,1,0,9,1,90,100,GridBagConstraints.HORIZONTAL,GridBagConstraints.EAST);addComponent(yearLabel,0,1,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(yeartext,1,1,5,1,90,100,GridBagConstraints.HORIZONTAL,GridBagConstraints.EAST);addComponent(loanLabel,0,2,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(loantext,1,2,5,1,90,100,GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);addComponent(monthrepayLabel,0,3,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(monthrepaytext,1,3,5,1,90,100,GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);addComponent(totalrepayLabel,0,4,1,1,10,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(totalrepaytext,1,4,5,1,40,100,GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);/按钮位置addComponent(quit,1,5,1,1,30,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);addComponent(tip,0,5,1,1,30,100,GridBagConstraints.NONE,GridBagConstraints.CENTER);setVisible(true);/显示粗来private void addComponent(Component component , int gridx, int gridy, int gridwidth, int gridheight ,int weightx, int weighty, int fill, int anchor)/窗口设计GridBagConstraints constraints = new GridBagConstraints();constraints.gridx = gridx;constraints.gridy = gridy;constraints.gridwidth = gridwidth;constraints.gridheight = gridheight;constraints.weightx = weightx;constraints.weighty = weighty;constraints.fill = fill;constraints.anchor = anchor;gridbag.setConstraints(component, constraints);add(component);public void actionPerformed(ActionEvent evt)/按钮的动作Object source = evt.getSource();if (source =tip)JOptionPane.showMessageDialog(null,班级：信计1302n学号：1111111111n姓名