求JAVA小項(xiàng)目的完整代碼

給你個(gè)做好了的Java的源程序的記事本，自己看看就行了的，不怎么難的···

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;

public class MyNotepad implements ActionListener{

private JFrame frame=new JFrame("新記事本");

private JTextArea jta=new JTextArea();

private String result="";

private boolean flag=true;

private File f;

private JButton jb=new JButton("開始");

private JTextField jtf=new JTextField(15);

private JTextField jt=new JTextField(15);

private JButton jbt=new JButton("替換為");

private JButton jba=new JButton("全部替換");

private Icon ic=new ImageIcon("D:\\java課堂筆記\\GUI\\11.gif");

private String value;

private int start=0;

private JFrame jf=new JFrame("查找");

private JFrame jfc=new JFrame("替換");

@Override

public void actionPerformed(ActionEvent e) {

String comm=e.getActionCommand();

if("新建".equals(comm)){

if(!(frame.getTitle().equals("新記事本"))){

if(!flag){

write();

newNew();

}else{

JFileChooser jfc=new JFileChooser("D:\\java課堂筆記");

int returnVal = jfc.showDialog(null,"保存為");

if(returnVal == JFileChooser.APPROVE_OPTION) {//選擇文件后再執(zhí)行下面的語句，保證了程序的健壯性

f=jfc.getSelectedFile();

flag=false;

write();

}

}

}else if(!(jta.getText().isEmpty())){

JFileChooser jfc=new JFileChooser("D:\\java課堂筆記");

int returnVal = jfc.showDialog(null,"保存為");

if(returnVal == JFileChooser.APPROVE_OPTION) {//選擇文件后再執(zhí)行下面的語句，保證了程序的健壯性

f=jfc.getSelectedFile();

flag=false;

write();

newNew();

}

}else{

newNew();

}

}else if("打開".equals(comm)){

JFileChooser jfc=new JFileChooser("D:\\java課堂筆記");

jfc.setDialogType(JFileChooser.OPEN_DIALOG);

int returnVal = jfc.showOpenDialog(null);

if(returnVal == JFileChooser.APPROVE_OPTION) {//選擇文件后再執(zhí)行下面的語句，保證了程序的健壯性

f=jfc.getSelectedFile();

frame.setTitle(f.getName());

result=read();

flag=false;

value=result;

jta.setText(result);

}

}else if("保存".equals(comm)){

JFileChooser jfc=new JFileChooser("D:\\java課堂筆記");

if(flag){

int returnVal = jfc.showDialog(null,"保存為");

if(returnVal == JFileChooser.APPROVE_OPTION) {//選擇文件后再執(zhí)行下面的語句，保證了程序的健壯性

f=jfc.getSelectedFile();

flag=false;

write();

}

}else{

write();

}

}else if("另存".equals(comm)){

JFileChooser jfc=new JFileChooser("D:\\java課堂筆記");

int returnVal = jfc.showDialog(null,"另存");

if(returnVal == JFileChooser.APPROVE_OPTION) {//選擇文件后再執(zhí)行下面的語句，保證了程序的健壯性

f=jfc.getSelectedFile();

write();

}

}else if("退出".equals(comm)){

System.exit(0);

}else if("撤銷".equals(comm)){

jta.setText(value);

}else if("剪切".equals(comm)){

value=jta.getText();

jta.cut();

}else if("復(fù)制".equals(comm)){

jta.copy();

}else if("粘貼".equals(comm)){

value=jta.getText();

jta.paste();

}else if("刪除".equals(comm)){

value=jta.getText();

jta.replaceSelection(null);

}else if("全選".equals(comm)){

jta.selectAll();

}else if("查找".equals(comm)){

value=jta.getText();

jf.add(jtf,BorderLayout.CENTER);

jf.add(jb,BorderLayout.SOUTH);

jf.setLocation(300,300);

jf.pack();

jf.setVisible(true);

jf.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

}else if("替換".equals(comm)){

value=jta.getText();

GridLayout gl=new GridLayout(3,3);

JLabel jl1=new JLabel("查找內(nèi)容:");

JLabel jl2=new JLabel("替換為:");

jfc.setLayout(gl);

jfc.add(jl1);

jfc.add(jtf);

jfc.add(jb);

jfc.add(jl2);

jfc.add(jt);

jfc.add(jbt);

JLabel jl3=new JLabel();

JLabel jl4=new JLabel();

jfc.add(jl3);

jfc.add(jl4);

jfc.add(jba);

jfc.setLocation(300,300);

jfc.pack();

jfc.setVisible(true);

jfc.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

}else if("版本".equals(comm)){

JDialog jd=new JDialog(frame,"關(guān)于對(duì)話框");

jd.setSize(200,200);

JLabel l=new JLabel("哈哈哈哈哈哈哈哈哈哈呵呵呵呵呵呵呵呵呵呵呵呵呵");

jd.add(l,BorderLayout.CENTER);

jd.setLocation(100,200);

jd.setSize(300,300);

jd.setVisible(true);

// jd.pack();

jd.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

}else if("開始".equals(comm)||"下一個(gè)".equals(comm)){

String temp=jtf.getText();

int s=value.indexOf(temp,start);

if(value.indexOf(temp,start)!=-1){

jta.setSelectionStart(s);

jta.setSelectionEnd(s+temp.length());

jta.setSelectedTextColor(Color.GREEN);

start=s+1;

jb.setText("下一個(gè)");

// value=value.substring(s+temp.length());//不能截取字串

}else {

JOptionPane.showMessageDialog(jf, "查找完畢!", "提示", 0, ic);

jf.dispose();

}

}else if("替換為".equals(comm)){

String temp=jtf.getText();

int s=value.indexOf(temp,start);

if(value.indexOf(temp,start)!=-1){

jta.setSelectionStart(s);

jta.setSelectionEnd(s+temp.length());

jta.setSelectedTextColor(Color.GREEN);

start=s+1;

jta.replaceSelection(jt.getText());

}else {

JOptionPane.showMessageDialog(jf, "查找完畢!", "提示", 0, ic);

jf.dispose();

}

}else if("全部替換".equals(comm)){

String temp=jta.getText();

temp=temp.replaceAll(jtf.getText(), jt.getText());

jta.setText(temp);

}

}

public String read(){

String temp="";

try {

FileInputStream fis = new FileInputStream(f.getAbsolutePath());

byte[] b=new byte[1024];

while(true){

int num=fis.read(b);

if(num==-1)break;

temp=temp+new String(b,0,num);

}

fis.close();

} catch (Exception e1) {

e1.printStackTrace();

}

return temp;

}

public void write(){

try {

FileOutputStream fos=new FileOutputStream(f);

fos.write(jta.getText().getBytes());

fos.close();

} catch (Exception e) {

e.printStackTrace();

}

}

public void newNew(){

frame.dispose();

new MyNotepad();

flag=true;

}

public MyNotepad(){

JMenuBar jmb=new JMenuBar();

String[] menuLab={"文件","編輯","幫助"};

String[][] menuItemLab={{"新建","打開","保存","另存","退出"},

{"撤銷","剪切","復(fù)制","粘貼","刪除","全選","查找","替換"},

{"版本"}};

for(int i=0;imenuLab.length;i++){

JMenu menu=new JMenu(menuLab[i]);

jmb.add(menu);

for(int j=0;jmenuItemLab[i].length;j++){

JMenuItem jmi=new JMenuItem(menuItemLab[i][j]);

menu.add(jmi);

jmi.addActionListener(this);

}

}

frame.setJMenuBar(jmb);

jta.setLineWrap(true);//自動(dòng)換行

JScrollPane jsp=new JScrollPane(jta);//滾動(dòng)窗口面板

frame.add(jsp);

jb.addActionListener(this);

jbt.addActionListener(this);

jba.addActionListener(this);

frame.setLocation(200,50);

frame.setSize(620,660);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new MyNotepad();

}

}

求一個(gè)java程序代碼

package Test1;

import java.time.LocalDateTime;

import java.time.Month;

import java.util.IntSummaryStatistics;

import java.util.Scanner;

import java.util.Vector;

public class D {

static String s1 = "";

public static void main(String[] args) {

int day = LocalDateTime.now().getDayOfMonth();

Month month = LocalDateTime.now().getMonth();

int i = 1, i1 = 0;

VectorInteger vector=new Vector();

Scanner scanner = new Scanner(System.in);

while (i day + 1) {

System.out.println("請(qǐng)輸入" + month + "月" + i + "日走的步數(shù)");

try {

i1 = scanner.nextInt();

} catch (Exception e) {

// TODO: handle exception

System.out.println("輸入錯(cuò)誤,請(qǐng)重新輸入");

continue;

}

vector.add(i1);

i++;

}

scanner.close();

IntSummaryStatistics intSummaryStatistics=vector.stream().mapToInt(x-x).summaryStatistics();

int i2=intSummaryStatistics.getMax();

int i3=vector.indexOf(i2);

System.out.println(month+"月走的步數(shù)最多的日期為: "+(i3+1)+"號(hào)");

System.out.println("最多的步數(shù)為: "+i2);

}

}

java練習(xí)題求完整代碼

按照題目要求編寫的用javaBean規(guī)范設(shè)計(jì)的學(xué)生類Student的Java程序如下

需要?jiǎng)?chuàng)建user.java.test包,把Student.java文件和Test.java文件放入包中,編譯Student.java文件并且編譯運(yùn)行Test.java文件得到運(yùn)行結(jié)果

Student.java文件代碼如下

package user.java.test;

import java.io.Serializable;

public class Student implements Serializable{

private static final long serialVersionUID = 1L;

private String no;

private String name;

private double score;

public Student(){}

public Student(String no,String name,double score){

this.no=no;

this.name=name;

this.score=score;

}

public String getNo(){ return no;}

public void setNo(String no){ this.no=no;}

public String getName(){ return name;}

public void setName(String name){ this.name=name;}

public double getScore(){ return score;}

public void setScore(double score){ this.score=score;}

public String toString(){

return "學(xué)號(hào):"+no+",姓名:"+name+",成績(jī):"+score;

}

public static double getAvg(Student[] sArray){

double sum=0,avg;

for(int i=0;isArray.length;i++){

sum=sum+sArray[i].getScore();

}

avg=sum/sArray.length;

return avg;

}

}

Test.java文件代碼如下

package user.java.test;

public class Test{

public static void main(String[] args){

Student[] sArray=new Student[5];

sArray[0]=new Student("001","張三",89.5);

sArray[1]=new Student("002","李四",82.5);

sArray[2]=new Student("003","王五",93);

sArray[3]=new Student("004","趙六",73.5);

sArray[4]=new Student("005","孫七",66);

System.out.println("這些學(xué)生的平均分:"+Student.getAvg(sArray));

for(int i=0;isArray.length;i++){

System.out.println(sArray[i].toString());

}

}

}