怎么用java语言写银行利息计算器
2024-05-08 17:14
1. 怎么用java语言写银行利息计算器
首先你得把你的银行利息计算的公式列出来才好写
2. 用java编写程序:求银行本息的!题目如下:
简单些了个，如果没理解错的话，应该可以满足要求：
public class Benxi{
private double benxi;//本息
private double lilu;//年利率
//计算本息
private double resBenxi(double money,int year){
benxi=money+money*getLilu(year)*year;
return benxi;
}
//选择利率
private double getLilu(int year){
switch(year){
case 1:
lilu=2.25/100;
break;
case 2:
lilu=2.7/100;
break;
case 3:
lilu=3.24/100;
break;
case 5:
lilu=3.6/100;
break;
}
return lilu;
}
public static void main(String[] args){
Benxi bx=new Benxi();
System.out.println("10000元存一年的本息为:"+bx.resBenxi(10000,1));
System.out.println("10000元存两年的本息为:"+bx.resBenxi(10000,2));
System.out.println("10000元存三年的本息为:"+bx.resBenxi(10000,3));
System.out.println("10000元存五年的本息为:"+bx.resBenxi(10000,5));
}
}
3. java编写程序,计算在银行存10000元一年后的金额,银行一年的定期利息是百
public class Test { public static void main(String[] args) { double rate = 3.0 / 100; // 利息3% double amt = 10000; // 金额 10000 int daysOfYear = 365; // 利息计算方式 int term = 365; // 存多久 365天表示一年 // 利息 double interest = (term / daysOfYear) * (amt * rate); // 到期金额 double mamt = interest + amt; System.out.println(amt + "元存银行" + term + "天，利息是：" + interest + "，到期金额是：" + mamt + "。"); } }
4. 最简单的银行管理系统有利息算法的java简单代码
package com.nsu.java.base;
import java.util.Scanner;
public class homework {
public static void main(String[] args) {
double a=0.0115;
double b;
double d;
double c,f;
System.out.println("请输入您的存款金额：");
Scanner it=new Scanner(System.in);
d=it.nextDouble();
System.out.println("请输入您的存款期限：");
b=it.nextDouble();
c=d-d+d*a;
f=b*c;
System.out.println("您的预期收入为："+f);
}
}
建议把上面的包名改一下。
5. 求用java编写的计算器代码？
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class jisuan extends Applet implements ActionListener
{
public int c=0;
public int a=0;
public int w=0;
Button b[];
String names[]={"0","1","2","3","4","5","6","7","8","9",".","+","-","*","/","=","clear"};
TextField text1;
public void init()
{
text1=new TextField();
text1.addActionListener(this);
add(text1);
setLayout(new GridLayout(5,3,5,5));
b=new Button[names.length];
for(int i=0;i<names.length;i++)
{
b[i]=new Button(names[i]);
b[i].addActionListener(this);
add(b[i]);
}
} //显示计算器上最基本的按钮
public void actionPerformed(ActionEvent e)
{
for(int i=0;i<b.length;i++)
if(e.getSource()==b[i])
{
if(i<=9)
{
text1.setText(text1.getText()+Integer.toString(i));
a=Integer.parseInt(text1.getText()); //保存第一次输入的数值
}
else if(i==10) text1.setText(text1.getText()+".");
else if(i==11)
{
c=11; //判断是否是加号
w=a;
text1.setText(" ");
}
else if(i==15)
{
if(c==11)
w=0;
}
}
else if(i==16) text1.setText(" ");
validate();
}
}
}
6. JAVA计算存款利息
/**需求：本金1万元人民币，以一年期整存整取的形式储蓄在银行，一年期利率为2.79%，n年后连本带息共计多少钱。*/class Calculate{public double calcuTotal(double prin,double rate,int n) //参数分别是本金、利率,存放期{double inte=0.00; //利息double sum=prin; for(int i=0;i<n;i++){inte=inte+prin*rate; //一年期整存整存的利息算法}sum+=inte;return sum; }}class ParamSet{public static void main(String[] args){//设置你要的参数double prin=10000.00;double rate=0.0279;int n=10; //存多少年Calculate c = new Calculate();double sum=c.calcuTotal(prin,rate,n);System.out.println("本金："+prin+" 元 \n存款利率："+rate+'\n'+n+"年后连本带息共为："+sum+"元");}}
7. JAVA 编写计算器 要代码最简单的
学java的时候自己编的，很简单，能够连续输入计算式后进行计算
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
/**简易计算器，能够进行简单的计算
*
* @see 2008.12.9
*/
public class CalculatorA
implements ActionListener{
private JFrame frame;
private JTextField field;
private JButton[] allButtons;
private JButton clearButton;
// private JButton backButton;
String result="";//保存结果
StringBuilder sb = new StringBuilder();//保存要进行的计算式
int x = 0; //用来判断上一次的事件类型
String str = "123+456-789*0.=/";
ArrayList arrayList = new ArrayList();//保存计算式，通过方法进行运算
public CalculatorA(){
frame = new JFrame("我的计算器v1.1");
frame.setLocation(300,300);
field = new JTextField(25);
allButtons = new JButton[16];
for(int i=0;i<allButtons.length;i++){
allButtons[i]= new JButton(str.substring(i,i+1));
}
clearButton = new JButton("CLEAR");
// backButton = new JButton("<——");
init();
setFondAndColor();
addEventHander();
}
public void init(){
frame.setLayout(new BorderLayout());
JPanel northPanel = new JPanel();
JPanel centerPanel = new JPanel();
JPanel southPanel = new JPanel();
northPanel.setLayout(new FlowLayout());
centerPanel.setLayout(new GridLayout(4,4));
southPanel.setLayout(new FlowLayout());
northPanel.add(field);
for(int i=0;i<allButtons.length;i++){
centerPanel.add(allButtons[i]);
}
southPanel.add(clearButton);
//southPanel.add(backButton);
frame.add(northPanel,BorderLayout.NORTH);
frame.add(centerPanel,BorderLayout.CENTER);
frame.add(southPanel,BorderLayout.SOUTH);
}
//设置输入字体
public void setFondAndColor(){
field.setFont(new Font("宋体",Font.BOLD,24));
field.setBackground(new Color(100,200,200));
field.setForeground(Color.RED);
//设置字体从右起始
field.setHorizontalAlignment(JTextField.RIGHT);
}
public void showMi(){
frame.pack();
frame.setResizable(false);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void addEventHander(){
for(int i=0;i<allButtons.length;i++){
allButtons[i].addActionListener(this);
}
clearButton.addActionListener(this);
// backButton.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
String str = e.getActionCommand();//取得当前事件返回的值
if("0123456789.".indexOf(str)!=-1){
if(x == 0){ //当x为0时表示还没有进行输入
result=str;
sb.append(str);
field.setText(str);
x = 1;
}
else if(x == 1){
result = result +str;
sb.append(str);
field.setText(result);
x = 1;
}
else if(x == 2){
sb.delete(0,sb.length());
result = result+str;
sb.append(str);
field.setText(result);
x = 1;
}
else if(x == 3){
result = str;
sb.delete(0,sb.length());
arrayList.clear();
field.setText(str);
sb.append(str);
field.setText(str);
x = 1;
}
else if(x == 4){
result ="";
sb.delete(0,sb.length());
arrayList.clear();
result = str;
sb.append(str);
field.setText(str);
x = 1;
}
else{
result = result +str;
sb.append(str);
field.setText(result);
x = 1;
}
}
else if("+*-/".indexOf(str)!=-1){
if(x == 0){
field.setText("");
x = 2;
}
else if(x == 1){
result = result + str;
arrayList.add(sb.toString());
arrayList.add(str);
sb.append(str);
field.setText(result);
x = 2;
}
else if(x == 2){
x = 2;
}
else if(x == 3){
field.setText(result+str);
arrayList.add(result);
arrayList.add(str);
result = result+str;
x = 2;
}
else if(x == 4){
result ="";
sb.delete(0,sb.length());
arrayList.clear();
x = 2;
}
else{
field.setText(result+str);
arrayList.add(result);
arrayList.add(str);
result = result+str;
x = 2;
}
}
else if("=".equals(str)){
if(x == 0){
field.setText("0");
arrayList.clear();
result = "0";
x = 3;
}
else if(x == 1){
try{
arrayList.add(sb.toString());
arrayList = getResult(arrayList);
result = arrayList.get(0);
field.setText(result);
arrayList.clear();
x = 3;
}catch(Exception e1){
field.setText("数据格式异常");
x = 0;
}
}
else if(x == 2){
field.setText("数据格式错误.....");
arrayList.clear();
x = 0;
}
else if(x == 3){
field.setText(result);
x = 3;
}
else if(x == 4){
result ="";
sb.delete(0,sb.length());
arrayList.clear();
x = 3;
}
else {
try{
arrayList.add(sb.toString());
arrayList = getResult(arrayList);
result = arrayList.get(0);
field.setText(result);
arrayList.clear();
x = 3;
}catch(Exception e1){
field.setText("数据格式异常");
x = 0;
}
}
}
else if("CLEAR".equals(str)){
arrayList.clear();
field.setText("0");
arrayList.add("0");
x = 4;
}
else{
if(result.length()>1){
result = result.substring(0,result.length()-1);
if(sb.length()>0){
sb.delete(sb.length()-1,sb.length());
}
else {
sb.delete(0,1);
}
field.setText(result);
x = 5;
}
else{
result = "";
sb.delete(0,sb.length());
arrayList.clear();
field.setText("0");
x = 0;
}
}
}
public static ArrayList getResult(ArrayList list){
String res = null;
String[] s = {"/","*","-","+"};
int i=0;
if(list.size()>1){
for(;i<s.length;){
if(s[i].equals("/")){
for(int j=0;j<list.size();j++){
if(list.get(j).equals(s[i])){
res = Double.toString(Double.parseDouble(list.get(j-1))/Double.parseDouble(list.get(j+1)));
//本地的数据格式
NumberFormat nf = NumberFormat.getInstance();
res = nf.format(Double.parseDouble(res));
res = getChange(res);
list.set(j-1,res);
list.remove(j);
list.remove(j);
getResult(list);
}
}
i++;
}
else if(s[i].equals("*")){
for(int j=0;j<list.size();j++){
if(list.get(j).equals(s[i])){
res = Double.toString(Double.parseDouble(list.get(j-1))*Double.parseDouble(list.get(j+1)));
NumberFormat nf = NumberFormat.getInstance();
res = nf.format(Double.parseDouble(res));
res = getChange(res);
list.set(j-1,res);
list.remove(j);
list.remove(j);
getResult(list);
}
}
i++;
}
else if(s[i].equals("-")){
for(int j=0;j<list.size();j++){
if(list.get(j).equals(s[i])){
res = Double.toString(Double.parseDouble(list.get(j-1))-Double.parseDouble(list.get(j+1)));
NumberFormat nf = NumberFormat.getNumberInstance();
res = nf.format(Double.parseDouble(res));
res = getChange(res);
list.set(j-1,res);
list.remove(j);
list.remove(j);
getResult(list);
}
}
i++;
}
else {
for(int j=0;j<list.size();j++){
if(list.get(j).equals(s[i])){
res = Double.toString(Double.parseDouble(list.get(j-1))+Double.parseDouble(list.get(j+1)));
NumberFormat nf = NumberFormat.getInstance();
res = nf.format(Double.parseDouble(res));
res = getChange(res);
list.set(j-1,res);
list.remove(j);
list.remove(j);
getResult(list);
}
}
i++;
}
}
}
return list;
}
//对数字字符串进行排除不必要符号
public static String getChange(String res){
String s_temp = "";
char[] c = new char[res.length()];
for(int k=0;k<c.length;k++){
c[k] = res.charAt(k);
}
for(int k=0;k<c.length;k++){
if((c[k]>= '0' && c[k]<= '9')|| c[k] == '.'){
s_temp += c[k];
}
}
return s_temp;
}
public static void main(String[] args){
new CalculatorA().showMi();
}
}
8. java 计算存款利息
money(1+rate)^year - money 是money * (1+rate)^year - money，和普通的数学顺序一样，先计算级别高的，括号内的1+rate、再乘方year、再乘 money，最后减money。 转成java的计算式，也是按顺序的，乘方的地方就是按JAVA的函数pow的要求，写进参数。 money*Math.pow((1+rate),year)-money;
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