2.编写一个 java 程序，输入形式为 First Middle Last

软件 2022-06-25

关于JAVA输出单词首字母的程序

importjava.util.Scanner;
publicclassAssignment3{
publicstaticvoidmain(String[]args){
System.out.println("Whatareyourfirst,middle,andlastnames?");
Scannerscan=newScanner(System.in);
StringfullName=scan.nextLine();
if(fullName==null){
promptWrongName();
return;
}
String[]names=fullName.split("");
if(!verifyNames(names))
return;
printNames(names);
}
privatestaticvoidprintNames(String[]names){
printInitials(names);
printVariationOne(names);
printVariationTwo(names);
}
privatestaticStringcapitalizeFirstLetter(Stringname){
returnname.trim().substring(0,1).toUpperCase()+name.trim().substring(1).toLowerCase();
}
privatestaticStringgetInitialInUpperCase(Stringname){
returnname.trim().substring(0,1).toUpperCase();
}
privatestaticvoidprintVariationTwo(String[]names){
System.out.print("VariationTwo:");
System.out.print(capitalizeFirstLetter(names[names.length-1]));
System.out.print(",");
System.out.print(capitalizeFirstLetter(names[0]));
if(names.length==3){
System.out.print("");
System.out.print(capitalizeFirstLetter(names[1]));
}
System.out.println();
}
privatestaticvoidprintVariationOne(String[]names){
System.out.print("VariationOne:");
System.out.print(names[names.length-1].trim().toUpperCase());
System.out.print(",");
System.out.print(capitalizeFirstLetter(names[0]));
if(names.length==3){
System.out.print("");
System.out.print(getInitialInUpperCase(names[1]));
System.out.print(".");
}
System.out.println();
}
privatestaticvoidprintInitials(String[]names){
System.out.print("Yourinitialsare:");
for(inti=0;iSystem.out.print(getInitialInUpperCase(names[i]));
}
System.out.println();
}
privatestaticbooleanverifyNames(String[]names){
if(names.length!=2&&names.length!=3){
promptWrongName();
returnfalse;
}
for(inti=0;iif("".equals(names[i].trim())){
promptWrongName();
returnfalse;
}
}
returntrue;
}
privatestaticvoidpromptWrongName(){
System.out.println("Wrong.Pleaseenteryournamesproperly.");
}
}

编写java程序

//这是第一题的代码
public class Customer {
public String customerId; //客户身份证
public String custName; //客户姓名
public String custGender; //客户性别
public Customer(String customerId, String custName, String custGender){
this.customerId = customerId;
this.custName = custName;
this.custGender = custGender;
}
public String getID() {
return customerId;
}
public void setID(String customerId) {
this.customerId = customerId;
}
public String getName() {
return custName;
}
public void setName(String custName) {
this.custName = custName;
}
public String getGender() {
return custGender;
}
public void setGender(String custGender) {
this.custGender = custGender;
}
public void printMSG(){
System.out.println("客户身份证：" + this.getID());
System.out.println("客户姓名：" + this.getName());
System.out.println("客户性别：" + this.getGender());
}
public static void main(String[] args) {
Customer c = new Customer("11111","小童鞋_成er","男");
c.printMSG();
}
}

编写一个java程序,完成以下功能:

public static void main(String [] args){ String s = "Callme Ishmael."; //声明一个名为s的字符串,并使它的内容为”Callme Ishmael.” System.out.println(s); //打印整个字符串 System.out.println(s.length()); //使用length()方法打印字符串的长度 System.out.println(s.charAt(0)); //使用charAt()方法打印字符串的第一个字符 System.out.println(s.charAt(s.length()-1));

要求编写一个java程序，输入学生信息，并能保存与显示学生信息。

import java.util.ArrayList; import java.util.Scanner;import com.sun.org.apache.xpath.internal.Arg; public class Student { //两个私有属性 private int no ; private String name ; //默认构造函数 public Student(){} //带参构造函数 public Student(int no,String name){ this.no=no; this.name=name; } //添加学生信息 public void addStu

编写一个Java应用程序,要求如下:

我刚好谢了一个绝对原创
用到了图片，你可以将图片的代码删掉
importjava.awt.*;
importjava.awt.event.*;
importjavax.swing.*;
importjava.io.*;
publicclassNotepadextendsJFrameimplementsActionListener{
	
	JMenuBarjbar;//菜单条
	JMenuwj,bj,bz;									//菜单
	JMenuItemopen,save,osave,exit,help,me;//菜单项
	JTextAreajta;//文本区
publicNotepad(){
	jbar=newJMenuBar();
	
	wj=newJMenu("文件");
	bj=newJMenu("编辑");
	bz=newJMenu("帮助");
	jbar.add(wj);
	jbar.add(bj);
	jbar.add(bz);
	setJMenuBar(jbar);
	
	open=newJMenuItem("打开",newImageIcon("img/dk.png"));
	open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));
	wj.add(open);
	open.addActionListener(this);
	open.setActionCommand("open");
	wj.addSeparator();
	save=newJMenuItem("保存");
	wj.add(save);
	save.addActionListener(this);
	save.setActionCommand("save");
	osave=newJMenuItem("另存为",newImageIcon("img/bc.png"));
	wj.add(osave);
	osave.addActionListener(this);
	osave.setActionCommand("osave");
	wj.addSeparator();
	exit=newJMenuItem("退出");
	wj.add(exit);
	exit.addActionListener(this);
	exit.setActionCommand("exit");
	help=newJMenuItem("查看帮助");
	bz.add(help);
	bz.addSeparator();
	me=newJMenuItem("关于记事本");
	bz.add(me);
	
	jta=newJTextArea();
	this.add(newJScrollPane(jta),BorderLayout.CENTER);
	
	this.setVisible(true);
	this.setSize(500,400);
	this.setTitle("桃子记事本");
	this.setLocationRelativeTo(null);
	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
publicvoidactionPerformed(ActionEvente){
if(e.getActionCommand().equals("open")){
	JFileChooserjfc=newJFileChooser();
	jfc.setDialogTitle("请选择文件");
	jfc.showOpenDialog(null);
	jfc.setVisible(true);
	
	Stringfilepath=jfc.getSelectedFile().getAbsolutePath();
	
	FileReaderfr=null;
	BufferedReaderbr=null;
	try{
		fr=newFileReader(filepath);
		br=newBufferedReader(fr);
		
		Strings="";
		Stringb="";
		while((s=br.readLine())!=null){
			b+=s+"\r\n";
			//System.out.println(s);
		}
		jta.setText(b);
	}catch(Exceptione1){
		e1.printStackTrace();
	}finally{
		try{
			br.close();
		}catch(IOExceptione1){
			e1.printStackTrace();
		}
	}
	}
elseif(e.getActionCommand().equals("osave")){
		JFileChooserjfc=newJFileChooser();
		jfc.setDialogTitle("请选择路径");
		jfc.showSaveDialog(null);
		jfc.setVisible(true);
		
		Stringfilepath=jfc.getSelectedFile().getAbsolutePath();
		
		FileWriterfw=null;
		BufferedWriterbw=null;
		try{
			fw=newFileWriter(filepath);
			bw=newBufferedWriter(fw);
			bw.write(jta.getText());
			}catch(Exceptione2){
			e2.printStackTrace();
		}finally{
			try{
				bw.close();
			}catch(IOExceptione1){
				e1.printStackTrace();
			}
		}
	}
	elseif(e.getActionCommand().equals("exit")){
		System.exit(0);
		}
	}			
}