学生管理系统的GUI应用
先决条件： Java Swing
编写一个程序来构建一个 GUI 应用程序，该应用程序提供大学生的详细信息、他的课程以及需要支付的费用。费用计算并保存在文本文件中。该程序还必须能够打印收据。
方法：该概念基于 GUI（图形用户界面）。这个想法是使用Java Swing 和 AWT。因此，我们需要根据功能定义所有方法。程序中的方法如下：
- 收据：此方法的主要功能是显示在文本字段中输入的所有数据、要学习的课程以及需要支付的最终金额。这些操作可以通过将 ActionListeners 添加到名为receipt的按钮来完成。
- 重置：此方法的功能是清除文本区域和文本字段中已经可见的信息，并添加新学生的详细信息并打印该特定学生的费用。可以通过将 ActionListeners 添加到按钮来完成。
- 打印：此方法的功能是在打印机可用时打印费用收据。我们可以通过将 ActionListener 添加到按钮来做到这一点。文本区域中的全部信息被命名为area2 ，并保存在计算机中名为Java.txt的文件中。它还会显示一个对话框，数据保存成功。
下面是上述方法的实现：
Java
// Java program to implement a GUI
// application for the student
// management system
import javax.swing.*;
import java.awt.*;
import java.awt.Image;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.print.*;
import javafx.print.Printer;
import java.io.*;
import java.io.IOException;
// Creating the fee class
public class fee extends Frame {
JLabel l1, l2, l3, l4,
l5, l6, l7, l8,
l9, l10, l12, l13,
l14, l11, l15;
JTextField tf1, tf2, tf3,
tf4, tf5, tf6,
tf7, tf8, tf9,
tf10;
JTextArea area2, area1;
JRadioButton rb1, rb2, rb3,
rb4, rb5, rb6,
rb7;
JFileChooser f1;
// Default constructor to
// initialize the parameters
fee()
{
l1 = new JLabel("Fee Report");
l1.setBounds(550, 100, 250, 20);
l2 = new JLabel(
"Name of the Student:");
l2.setBounds(50, 150, 250, 20);
tf1 = new JTextField();
tf1.setBounds(250, 150, 250, 20);
l3 = new JLabel(
"Name of the Father:");
l3.setBounds(50, 200, 250, 20);
tf2 = new JTextField();
tf2.setBounds(250, 200, 250, 20);
l4 = new JLabel("Roll Number:");
l4.setBounds(50, 250, 250, 20);
tf3 = new JTextField();
tf3.setBounds(250, 250, 250, 20);
l5 = new JLabel("Email ID:");
l5.setBounds(50, 300, 250, 20);
tf4 = new JTextField();
tf4.setBounds(250, 300, 250, 20);
l6 = new JLabel("Contact Number:");
l6.setBounds(50, 350, 250, 20);
tf5 = new JTextField();
tf5.setBounds(250, 350, 250, 20);
l7 = new JLabel("Address:");
l7.setBounds(50, 400, 250, 20);
area1 = new JTextArea();
area1.setBounds(250, 400, 250, 90);
l9 = new JLabel("Gender:");
l9.setBounds(50, 500, 250, 20);
JRadioButton r5
= new JRadioButton(" Male");
JRadioButton r6
= new JRadioButton(" Female");
r5.setBounds(250, 500, 100, 30);
r6.setBounds(350, 500, 100, 30);
ButtonGroup bg = new ButtonGroup();
bg.add(r5);
bg.add(r6);
l10 = new JLabel("Nationality:");
l10.setBounds(50, 550, 250, 20);
tf6 = new JTextField();
tf6.setBounds(250, 550, 250, 20);
l11 = new JLabel(
"Year of passing 10th");
l11.setBounds(50, 600, 250, 20);
String language[]
= { "2016", "2015", "2014" };
final JComboBox cb1
= new JComboBox(language);
cb1.setBounds(250, 600, 90, 20);
l12 = new JLabel(
"Year of passing 12th");
l12.setBounds(50, 650, 250, 20);
String languagess[]
= { "2019", "2018", "2017" };
l13 = new JLabel(
"Points Secured in 10th:");
l13.setBounds(50, 700, 250, 20);
tf7 = new JTextField();
tf7.setBounds(250, 700, 250, 20);
l14 = new JLabel("Percentage in 12th:");
l14.setBounds(50, 750, 250, 20);
tf8 = new JTextField();
tf8.setBounds(250, 750, 250, 20);
ImageIcon i2 = new ImageIcon("2.png");
JLabel l15
= new JLabel("", i2, JLabel.CENTER);
l15.setBounds(900, 50, 600, 200);
final JComboBox cb2
= new JComboBox(languagess);
cb2.setBounds(250, 650, 90, 20);
l8 = new JLabel(
"Groups Offered here are:");
l8.setBounds(800, 150, 250, 20);
rb1 = new JRadioButton("SEAS");
rb1.setBounds(550, 150, 100, 30);
rb2 = new JRadioButton("SLABS");
rb2.setBounds(650, 150, 100, 30);
ButtonGroup bg1 = new ButtonGroup();
bg1.add(rb1);
bg1.add(rb2);
rb3 = new JRadioButton("HOSTELLER");
rb3.setBounds(550, 200, 100, 30);
rb4 = new JRadioButton("DAY SCHOLAR");
rb4.setBounds(650, 200, 120, 30);
ButtonGroup bg2 = new ButtonGroup();
bg2.add(rb3);
bg2.add(rb4);
String languages[]
= { "CSE", "ECE", "EEE",
"CIVIL", "MECH" };
final JComboBox cb
= new JComboBox(languages);
cb.setBounds(800, 200, 90, 20);
final JLabel label
= new JLabel();
label.setBounds(600, 430, 500, 30);
JButton b = new JButton("Show");
b.setBounds(1000, 300, 80, 30);
final DefaultListModel li1
= new DefaultListModel<>();
li1.addElement("CSE(2, 50, 000)");
li1.addElement("ECE(2, 50, 000)");
li1.addElement("EEE(2, 50, 000)");
li1.addElement("MECH(2, 50, 000)");
li1.addElement("CIVIL(2, 50, 000)");
final JList list1
= new JList<>(li1);
list1.setBounds(600, 300, 125, 125);
DefaultListModel li2
= new DefaultListModel<>();
li2.addElement(
"2 SHARE(1, 50, 000)");
li2.addElement(
"3 SHARE(1, 40, 000)");
li2.addElement(
"5 SHARE(1, 20, 000)");
li2.addElement(
"8 SHARE(1, 10, 000)");
li2.addElement(
"bus(40, 000)");
final JList list2
= new JList<>(li2);
list2.setBounds(
800, 300, 125, 125);
JButton Receipt
= new JButton("Generate Receipt");
Receipt.setBounds(600, 490, 150, 30);
JButton b2 = new JButton("Reset");
b2.setBounds(750, 490, 150, 30);
JButton Print = new JButton("Print");
Print.setBounds(900, 490, 150, 30);
area2 = new JTextArea();
area2.setBounds(600, 540, 450, 240);
add(l1);
add(l2);
add(l3);
add(l4);
add(l5);
add(l6);
add(l7);
add(l8);
add(l9);
add(l10);
add(l11);
add(l12);
add(l13);
add(l14);
add(tf1);
add(tf2);
add(tf3);
add(tf4);
add(tf5);
add(tf6);
add(tf7);
add(tf8);
add(area1);
add(area2);
add(l15);
add(rb1);
add(rb2);
add(rb3);
add(rb4);
add(r5);
add(r6);
add(cb);
add(cb1);
add(cb2);
add(list1);
add(list2);
add(b);
add(label);
add(Receipt);
add(b2);
add(Print);
b.addActionListener(new ActionListener() {
// Method to display the data
// entered in the text fields
public void actionPerformed(ActionEvent e)
{
String data = "";
if (list1.getSelectedIndex() != -1) {
data = "You had selected the Group:"
+ list1.getSelectedValue();
label.setText(data);
}
if (list2.getSelectedIndex() != -1) {
data += " and Hostel with the "
+ "facility of: ";
for (Object frame :
list2.getSelectedValues()) {
data += frame + " ";
}
}
label.setText(data);
}
});
// Reset the text fields
b2.addActionListener(
new ActionListener() {
public void actionPerformed(
ActionEvent e)
{
area2.setText("");
area1.setText(" ");
tf1.setText("");
tf2.setText("");
tf3.setText("");
tf4.setText("");
tf5.setText("");
tf6.setText(" ");
}
});
// Implementing the Print action
Print.addActionListener(
new ActionListener() {
public void actionPerformed(
ActionEvent e)
{
try {
area2.print();
}
catch (java.awt.print
.PrinterException a) {
System.err.format(
"NoPrinter Found",
a.getMessage());
}
}
});
// Generating the receipt
Receipt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
area2.setText(
"--------------------------------"
+ "-----------FEE RECEIPT----"
+ "--------------------------"
+ "--------------------------"
+ "-------------------\n");
area2.setText(area2.getText()
+ "Student Name: "
+ tf1.getText()
+ "\n");
area2.setText(area2.getText()
+ "Father's Name: "
+ tf2.getText()
+ "\n");
area2.setText(area2.getText()
+ "RollNumber: "
+ tf3.getText()
+ "\n");
area2.setText(area2.getText()
+ "Email ID: "
+ tf4.getText()
+ "\n");
area2.setText(area2.getText()
+ "Contact Number: "
+ tf5.getText()
+ "\n");
area2.setText(area2.getText()
+ "Wants to take: "
+ cb.getSelectedItem()
.toString()
+ "\n");
if (rb1.isSelected()) {
area2.setText(area2.getText()
+ "Wants to Join in "
+ "School of Engineering "
+ "and Applied Sciences\n");
}
if (rb2.isSelected()) {
area2.setText(area2.getText()
+ "Wants to Join in "
+ "School of Liberal "
+ "Arts and Sciences\n");
}
if (rb3.isSelected()) {
area2.setText(area2.getText()
+ "Wants to be a "
+ "Hosteller \n");
}
if (rb4.isSelected()) {
area2.setText(area2.getText()
+ "Wants to be a "
+ "Day Scholar \n");
}
area2.setText(area2.getText()
+ "Had chosen: "
+ list1.getSelectedValue()
.toString()
+ "\n");
area2.setText(area2.getText()
+ "Had chosen: "
+ list2.getSelectedValue()
.toString()
+ "\n");
int index2 = list2.getSelectedIndex();
if (index2 == 0) {
area2.setText(area2.getText()
+ " "
+ "Total amount to be "
+ "paid is 4 Lakhs \n");
}
if (index2 == 1) {
area2.setText(area2.getText()
+ " "
+ "Total amount to be paid "
+ "is 3.9 Lakhs \n");
}
if (index2 == 2) {
area2.setText(area2.getText()
+ " "
+ "Total amount to be paid "
+ "is 3.8 Lakhs \n");
}
if (index2 == 3) {
area2.setText(area2.getText()
+ " "
+ "Total amount to be paid "
+ "is 3.7 Lakhs \n");
}
if (index2 == 4) {
area2.setText(area2.getText()
+ " "
+ "Total amount to be paid "
+ "is 2.9 Lakhs \n");
}
if (e.getSource() == Receipt) {
try {
FileWriter fw
= new FileWriter(
"java.txt", true);
fw.write(area2.getText());
fw.close();
}
catch (Exception ae) {
System.out.println(ae);
}
}
JOptionPane.showMessageDialog(
area2, "DATA SAVED SUCCESSFULLY");
};
});
addWindowListener(
new WindowAdapter() {
public void windowClosing(
WindowEvent we)
{
System.exit(0);
}
});
setSize(800, 800);
setLayout(null);
setVisible(true);
setBackground(Color.cyan);
}
public static void main(String[] args)
{
new fee();
}
} 输出：
- 运行上述程序时：
- 在各个字段中添加所有详细信息后：
- 当按下接收按钮时：
- 当数据存储在文本文件中时：
- 单击打印按钮时，将显示以下选项。如果打印机可用，则可以直接打印。
- 如果打印机可用，则预览文档：
