趣味数学--贷款计算（图形化界面版）
作者：互联网
1、用图形用户界面完成第4单元作业题1：趣味数学题
马克思手稿中有这样一道趣味数学题：男人、女人和小孩总计n个人，在一家饭店里吃饭，共花了cost先令，每个男人各花3先令，每个女人各花2先令，每个小孩各花1先令，请用穷举法编程计算男人、女人和小孩各有几个。
要求：设计图形界面，程序运行后，用户在图形界面中输入人数和总花费。若问题有解，计算男人、女人和小孩的数量并输出；若问题无解，则输出“No answer"。
注意：所有最终结果信息不要输出在控制台。
下面展示一些 内联代码片。
JFrame Designer
趣味数学
/*
* Created by JFormDesigner on Tue May 25 11:54:11 CST 2021
*/
package 慕课Java.第八单元;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* @author 介绍
*/
public class 趣味数学_图形 extends JFrame {
String columns[] = {"男人","女人","小孩"};
public 趣味数学_图形() {
setDefaultCloseOperation(3);
setTitle("趣味数学");
initComponents();
}
public static void main(String[] args) {
new 趣味数学_图形();
}
//确定按钮监听
private void button1ActionPerformed(ActionEvent e) {
// TODO add your code here
pre();
}
//处理
private void pre(){
String s1 = textField1.getText();
String s2 = textField2.getText();
if(s1.equals("")||s2.equals("")){
JOptionPane.showMessageDialog(this,"请输入");
}else{
int n = Integer.parseInt(s1);
int c = Integer.parseInt(s2);
String data[][] = new String[c][c];
int flag = 0;
int idx=0;
for (int i = 0; i <= n; i++) {
for (int j = 0; j <= n; j++) {
for (int k = 0; k <= n; k++) {
if (i + j + k == n && 3 * i + 2 * j + k == c) {
String s3 = Integer.valueOf(i).toString();
String s4 = Integer.valueOf(j).toString();
String s5 = Integer.valueOf(k).toString();
String s[] = {s3,s4,s5};
data[idx] = s;
idx++;
System.out.println(i + " " + j + " " + k);
flag = 1;
}
}
}
}
if (flag == 0) {
System.out.println("No answer");
JOptionPane.showMessageDialog(this,"No answer");
}else{
new 显示(data,columns);
}
}
}
private void initComponents() {
// JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents
// Generated using JFormDesigner Evaluation license - 介绍
label1 = new JLabel();
label2 = new JLabel();
textField1 = new JTextField();
textField2 = new JTextField();
button1 = new JButton();
//======== this ========
setVisible(true);
var contentPane = getContentPane();
contentPane.setLayout(null);
//---- label1 ----
label1.setText("num");
label1.setFont(label1.getFont().deriveFont(label1.getFont().getSize() + 5f));
contentPane.add(label1);
label1.setBounds(65, 60, 80, 55);
//---- label2 ----
label2.setText("cost");
label2.setFont(label2.getFont().deriveFont(label2.getFont().getSize() + 5f));
contentPane.add(label2);
label2.setBounds(65, 165, 80, 55);
contentPane.add(textField1);
textField1.setBounds(155, 55, 320, 65);
contentPane.add(textField2);
textField2.setBounds(155, 155, 320, 65);
//---- button1 ----
button1.setText("\u786e\u5b9a");
button1.setFont(button1.getFont().deriveFont(button1.getFont().getSize() + 8f));
button1.setBackground(new Color(153, 204, 255));
button1.addActionListener(e -> button1ActionPerformed(e));
contentPane.add(button1);
button1.setBounds(215, 275, 165, 105);
{
// compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < contentPane.getComponentCount(); i++) {
Rectangle bounds = contentPane.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = contentPane.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
contentPane.setMinimumSize(preferredSize);
contentPane.setPreferredSize(new Dimension(550,400));
}
pack();
setLocationRelativeTo(getOwner());
// JFormDesigner - End of component initialization //GEN-END:initComponents
}
// JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables
// Generated using JFormDesigner Evaluation license - 介绍
private JLabel label1;
private JLabel label2;
private JTextField textField1;
private JTextField textField2;
private JButton button1;
// JFormDesigner - End of variables declaration //GEN-END:variables
}
显示
/*
* Created by JFormDesigner on Tue May 25 11:57:19 CST 2021
*/
package 慕课Java.第八单元;
import java.awt.*;
import javax.swing.*;
/**
* @author 介绍
*/
public class 显示 extends JFrame {
String data[][] = null;//内容数据
String columns[] = null;//题头
public 显示(String data[][],String columns[]) {
this.data = data;
this.columns = columns;
this.setTitle("显示");
initComponents();
}
private void initComponents() {
// JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents
// Generated using JFormDesigner Evaluation license - 介绍
scrollPane1 = new JScrollPane();
table1 = new JTable(data,columns);
//======== this ========
setVisible(true);
var contentPane = getContentPane();
contentPane.setLayout(null);
//======== scrollPane1 ========
{
scrollPane1.setViewportView(table1);
}
contentPane.add(scrollPane1);
scrollPane1.setBounds(10, -5, 525, scrollPane1.getPreferredSize().height);
{
// compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < contentPane.getComponentCount(); i++) {
Rectangle bounds = contentPane.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = contentPane.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
contentPane.setMinimumSize(preferredSize);
contentPane.setPreferredSize(preferredSize);
}
pack();
setLocationRelativeTo(getOwner());
// JFormDesigner - End of component initialization //GEN-END:initComponents
}
// JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables
// Generated using JFormDesigner Evaluation license - 介绍
private JScrollPane scrollPane1;
private JTable table1;
// JFormDesigner - End of variables declaration //GEN-END:variables
}
2、用图形用户界面完成第4单元作业题2：贷款计算
为了认清校园贷的本质，请根据下面的描述，计算校园贷的实际花费。 用户借贷为等额本息贷款，贷款月利率为0.9%，每月还款金额计算如下式所示，
假设李雷贷款n元，分m月还清，贷款平台需要扣除本金的20%作为保证金，利率按足额贷款进行计算。
要求：设计图形界面，程序运行后，用户在图形界面中输入贷款金额和还款月数，计算李雷实际贷到的金额以及加上本金共需还款金额（结果四舍五入）并输出。
注意：所有最终结果信息不要输出在控制台。
下面展示一些 内联代码片。
贷款计算
/*
* Created by JFormDesigner on Tue May 25 12:27:03 CST 2021
*/
package 慕课Java.第八单元;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* @author 介绍
*/
public class 贷款计算 extends JFrame {
public 贷款计算() {
setTitle("贷款计算");
setDefaultCloseOperation(3);
initComponents();
}
public static void main(String[] args) {
new 贷款计算();
}
//确定按钮监听
private void button1ActionPerformed(ActionEvent e) {
// TODO add your code here
pre();
}
//处理
private void pre(){
String s1 = textField1.getText();
String s2 = textField2.getText();
if(s1.equals("")||s2.equals("")){
JOptionPane.showMessageDialog(this,"请输入");
}else{
int sum=0;
int n = Integer.parseInt(s1);
int m = Integer.parseInt(s2);
System.out.println(n/10*8);
double temp = 1.009;
for(int i=1;i<=m;i++){
sum+=(n*((Math.pow(temp,m)*0.009)/(Math.pow(temp,m)-1)));
}
System.out.println(Math.round(sum+n));
JOptionPane.showMessageDialog(this,""+Math.round(sum+n));
}
}
private void initComponents() {
// JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents
// Generated using JFormDesigner Evaluation license - 介绍
label1 = new JLabel();
label2 = new JLabel();
textField1 = new JTextField();
textField2 = new JTextField();
button1 = new JButton();
//======== this ========
setVisible(true);
var contentPane = getContentPane();
contentPane.setLayout(null);
//---- label1 ----
label1.setText("\u8d37\u6b3e\u91d1\u989d");
label1.setFont(label1.getFont().deriveFont(label1.getFont().getSize() + 5f));
contentPane.add(label1);
label1.setBounds(65, 60, 80, 55);
//---- label2 ----
label2.setText("\u8fd8\u6b3e\u6708\u6570");
label2.setFont(label2.getFont().deriveFont(label2.getFont().getSize() + 5f));
contentPane.add(label2);
label2.setBounds(65, 165, 80, 55);
contentPane.add(textField1);
textField1.setBounds(155, 55, 320, 65);
contentPane.add(textField2);
textField2.setBounds(155, 155, 320, 65);
//---- button1 ----
button1.setText("\u786e\u5b9a");
button1.setFont(button1.getFont().deriveFont(button1.getFont().getSize() + 8f));
button1.setBackground(new Color(153, 204, 255));
button1.addActionListener(e -> button1ActionPerformed(e));
contentPane.add(button1);
button1.setBounds(215, 275, 165, 105);
{
// compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < contentPane.getComponentCount(); i++) {
Rectangle bounds = contentPane.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = contentPane.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
contentPane.setMinimumSize(preferredSize);
contentPane.setPreferredSize(new Dimension(550,400));
}
pack();
setLocationRelativeTo(getOwner());
// JFormDesigner - End of component initialization //GEN-END:initComponents
}
// JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables
// Generated using JFormDesigner Evaluation license - 介绍
private JLabel label1;
private JLabel label2;
private JTextField textField1;
private JTextField textField2;
private JButton button1;
// JFormDesigner - End of variables declaration //GEN-END:variables
}
标签：--,preferredSize,button1,JFormDesigner,contentPane,private,趣味,new,图形化 来源： https://blog.csdn.net/NOfighting/article/details/117253568