java经典编程题源代码 java 代码题 _value

java问题，求源代码import java.util.Scanner;
public class Q {
public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
System.out.println("请输入两个字符");
String s=scan.nextLine();
boolean flag=true;
String msg="";
if(s.length()==2){
String first=s.substring(0,1);
String second=s.substring(1);
if(first.equals("M")){
msg ="数学";
}else if(first.equals("C")){
msg ="计算机科学";
}else if(first.equals("I")){
msg ="信息技术";
}else{
flag=false;
}
msg =" ";
if(second.equals("1")){
msg ="大一";
}else if(second.equals("2")){
msg ="大二";
}else if(second.equals("3")){
msg ="大三";
}else if(second.equals("4")){
msg ="大四";
}else{
flag=false;
}
}
if(flag){
System.out.println(msg);
}else{
System.out.println("输入不合法");
}
}
}
有问题请追问，没问题请采纳。
一道Java编程题求源代码public class Invoice {
String bianhao = null;
String shuoming = null;
int count = 0;
double price = 0.0;
public Invoice(String bianhao, String shuoming, int count, double price) {
this.bianhao = bianhao;
this.shuoming = shuoming;
if (count0) {
this.count = 0;
} else {
this.count = count;
}
if (price0.0) {
this.price = 0.0;
} else {
this.price = price;
}
}
public double getInvoiceAmount() {
return count * price;
}
public String getBianhao() {
return bianhao;
}
public void setBianhao(String bianhao) {
this.bianhao = bianhao;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getShuoming() {
return shuoming;
}
public void setShuoming(String shuoming) {
this.shuoming = shuoming;
}
}
public class InvoiceTest {
/**
* @param args
*/
public static void main(String[] args) {
Invoice invoice = new Invoice("010220", "Desk", 50, 53.9);
System.out.println(invoice.getInvoiceAmount());
}
}
求编写一个超级简单的Java的程序源代码import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class ConstructFrame extends JFrame
{
private static final long serialVersionUID = 1L;
String value1="",result,value2="";
int flag=0,fix=0,sum=1;
Booleanhappy;
JTextField text=new JTextField(30);
int flagsum=0;
Container c=getContentPane();
JButton buttonx;
ConstructFrame()
{super("计算器");
c.setLayout(null);
c.setBackground(Color.blue);
this.setSize(400, 400);
c.add(text);
text.setHorizontalAlignment(JTextField.RIGHT);
final JButton buttonx=new JButton("BackSpace");
c.add(buttonx);
buttonx.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
int count=0;
String temp;
if(flag==0)
{
count=value1.length();
if(count!=1)
temp=value1.substring(0, count-1);
else
temp="0";
value1=temp;
}
else
{
count=value2.length();
if(count!=1)
temp=value2.substring(0, count-1);
else
temp="0";
value2=temp;
}
text.setText(temp);
}
});
final JButton buttony=new JButton("CE");
c.add(buttony);
buttony.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
value1="";
value2="";
flag=0;
text.setText("0");
}
});
final JButton button1=new JButton("1");
c.add(button1);
button1.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 1;
temp=value1;
}
else
{
value2=value2 1;
temp=value2;
}
text.setText(temp);
}
});
final JButton button2=new JButton(" 2 ");
c.add(button2);
button2.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 2;
temp=value1;
}
else
{
value2=value2 2;
temp=value2;
}
text.setText(temp);
}
});
final JButton button3=new JButton("3");
c.add(button3);
button3.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 3;
temp=value1;
}
else
{
value2=value2 3;
temp=value2;
}
text.setText(temp);
}
});
final JButton button4=new JButton("4");
c.add(button4);
button4.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 4;
temp=value1;
}
else
{
value2=value2 4;
temp=value2;
}
text.setText(temp);
}
});
final JButton button5=new JButton("5");
c.add(button5);
button5.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 5;
temp=value1;
}
else
{
value2=value2 5;
temp=value2;
}
text.setText(temp);
}
});
final JButton button6=new JButton("6");
c.add(button6);
button6.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 6;
temp=value1;
}
else
{
value2=value2 6;
temp=value2;
}
text.setText(temp);
}
});
final JButton button7=new JButton("7");
c.add(button7);
button7.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 7;
temp=value1;
}
else
{
value2=value2 7;
temp=value2;
}
text.setText(temp);
}
});
final JButton button8=new JButton("8");
c.add(button8);
button8.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 8;
temp=value1;
}
else
{
value2=value2 8;
temp=value2;
}
text.setText(temp);
}
});
final JButton button9=new JButton("9");
c.add(button9);
button9.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 9;
temp=value1;
}
else
{
value2=value2 9;
temp=value2;
}
text.setText(temp);
}
});
final JButton button0=new JButton("0");
c.add(button0);
button0.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
String temp;
if(flag==0)
{
value1=value1 0;
temp=value1;
}
else
{
value2=value2 0;
temp=value2;
}
text.setText(temp);
}
});
final JButton buttonadd=new JButton("");
c.add(buttonadd);
buttonadd.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
flag=1;
fix=1;
flagsum=0;
}
});
final JButton buttonsubtract=new JButton(" - ");
c.add(buttonsubtract);
buttonsubtract.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
flag=1;
fix=2;
flagsum=0;
}
});
final JButton buttoncheng=new JButton(" * ");
c.add(buttoncheng);
buttoncheng.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
flag=1;
fix=3;
flagsum=0;
}
});
final JButton buttonchu=new JButton(" / ");
c.add(buttonchu);
buttonchu.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
flag=1;
flagsum=0;
fix=4;
}
});
final JButton buttonequal=new JButton(" = ");
c.add(buttonequal);
buttonequal.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{
double temp1,temp2;
double temp=0;
flagsum=0;
temp1=Double.parseDouble(value1);
temp2=Double.parseDouble(value2);
flag=0;
switch(fix)
{
case 1: temp=temp1 temp2;break;
case 2: temp=temp1-temp2;break;
case 3: temp=temp1*temp2;break;
case 4: temp=temp1/temp2;break;
}
result=Double.valueOf(temp).toString();
value1=result;
value2="";
flag=1;
text.setText(result);
}
});
final JButton buttonpoint=new JButton(".");
c.add(buttonpoint);
buttonpoint.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{if(flagsum==0)
{
String temp;
if(flag==0 )
{
value1=value1 ".";
temp=value1;
}
else
{
value2=value2 ".";
temp=value2;
}
flagsum=1;
text.setText(temp);
}
}
});
JButton buttonz=new JButton("Start");
c.add(buttonz);
buttonz.addMouseListener(new MouseAdapter()
{
public void mousePressed(MouseEvent e)
{if(sum%2==1)
{
happy=true;
text.setText("0.");
flag=0;
}
else
{
happy=false;
value1="";
value2="";
text.setText("");
}
text.setEnabled(happy);
button1.setEnabled(happy);
button2.setEnabled(happy);
button3.setEnabled(happy);
button4.setEnabled(happy);
button5.setEnabled(happy);
button6.setEnabled(happy);
button7.setEnabled(happy);
button8.setEnabled(happy);
button9.setEnabled(happy);
button0.setEnabled(happy);
buttonx.setEnabled(happy);
buttony.setEnabled(happy);
buttonadd.setEnabled(happy);
buttonsubtract.setEnabled(happy);
buttonpoint.setEnabled(happy);
buttonequal.setEnabled(happy);
buttoncheng.setEnabled(happy);
buttonchu.setEnabled(happy);
sum;
}
});
button1.setEnabled(false);
button2.setEnabled(false);
button3.setEnabled(false);
button4.setEnabled(false);
button5.setEnabled(false);
button6.setEnabled(false);
button7.setEnabled(false);
button8.setEnabled(false);
button9.setEnabled(false);
button0.setEnabled(false);
buttonx.setEnabled(false);
buttony.setEnabled(false);
buttonadd.setEnabled(false);
buttonsubtract.setEnabled(false);
buttonpoint.setEnabled(false);
buttonequal.setEnabled(false);
buttoncheng.setEnabled(false);
buttonchu.setEnabled(false);
text.setEnabled(false);
text.setBounds(20, 20, 200, 40);
buttonx.setBounds(20, 60,100, 40);
buttony.setBounds(140, 60,100, 40);
buttonz.setBounds(260, 60,80, 40);
button1.setBounds(20, 120,60, 40);
button2.setBounds(100, 120,60, 40);
button3.setBounds(180, 120,60, 40);
buttonadd.setBounds(260, 120,60, 40);
button4.setBounds(20, 180,60, 40);
button5.setBounds(100, 180,60, 40);
button6.setBounds(180, 180,60, 40);
buttonsubtract.setBounds(260, 180,60, 40);
button7.setBounds(20, 240,60, 40);
button8.setBounds(100, 240,60, 40);
button9.setBounds(180, 240,60, 40);
buttoncheng.setBounds(260,240,60,40);
button0.setBounds(20, 300,60, 40);
buttonpoint.setBounds(100, 300, 60, 40);
buttonequal.setBounds(180,300,60, 40);
buttonchu.setBounds(260, 300,60, 40);
setVisible(true);
}
class MYMouseEvent extends MouseAdapter
{
public void mousePressed(MouseEvent e)
{
value1=e.toString();
text.setText(value1);
}
}
}
class Calutator
{
public static void main(String[] args)
{
newConstructFrame();
}
}
你自己慢慢的看吧！
【java经典编程题源代码 java 代码题】关于java经典编程题源代码和java 代码题的介绍到此就结束了，不知道你从中找到你需要的信息了吗？如果你还想了解更多这方面的信息，记得收藏关注本站。

java经典编程题源代码 java 代码题

推荐阅读

有人说《斗罗大陆》到后来尺度变大了,对此你怎么看？是颓败了吗？

月经期间不能吃什么

pro/e曲面画的油壶作品

内江电商中心在什么地方办公内江电商中心在什么地方，内江电商中心在什么地方啊

兰贵人茶分几种兰贵人茶什么季节喝好

麒麟925能升级鸿蒙吗，麒麟925能玩什么游戏

密切接触者从哪天开始算隔离的时间

志不立则天下无可为之事什么意思

知了猴到底能不能吃

营口|辽宁营口接诊诊所大夫感染新冠周围商户：诊所就在摄影基地旁边

我不成功，都对不起父母曾经为我受的苦

airpods保修政策是什么（airpods是什么保修政策）

《向往的生活4》开播首期（何炅黄磊当家，周迅做客，张子枫社恐）

港剧有哪些经典剧集给推荐一下呗？

智能机器人在新时代是否会代替人类？霍金的预言真的要实现了吗？

实况手游怎么登录怎么登录实况服务器

传销是什么

前程似锦的寓意和象征锦的寓意和象征

达芬奇睡眠法可行吗

长春特产有哪些可以带