javasrc.docx

javasrc.docx

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javasrc

packagecom.example;

/**

*Createdbylpwon12/9/15.

*/

classRectangle{

privatedoublewidth;

privatedoubleheight;

privatedoublearea;

privatedoubleperimeter;

privateStringcolor;

publicRectangle（）{

width=1.2;

height=1.1;

color="blue";

}

publicdoublegetWidth（）{

returnwidth;

}

publicvoidsetWidth（doublewidth）{

this.width=width;

}

publicdoublegetHeight（）{

returnheight;

}

publicvoidsetHeight（doubleheight）{

this.height=height;

}

publicStringgetColor（）{

returncolor;

}

publicvoidsetColor（Stringcolor）{

this.color=color;

}

publicdoublegetArea（）{

area=width*height;

returnarea;

}

publicdoublegetPerimeter（）{

perimeter=（width+height）*2;

returnperimeter;

}

}

packagecom.example;

publicclasstest1_1{

publicstaticvoidmain（String[]args）{

Rectanglerectangle1=newRectangle（）;

System.out.println（"ĬÈϵ¥Î»£ºÃ×£¨m£©"）;

System.out.println（"¾ØÐÎĬÈϳõʼֵ£º¿í="+rectangle1.getWidth（）+

"£¬¸ß="+rectangle1.getHeight（）+

",ÑÕɫΪ"+rectangle1.getColor（））;

System.out.println（"Ãæ»ý£º"+rectangle1.getArea（）+"ƽ·½Ã×"）;

System.out.println（"Öܳ¤£º"+rectangle1.getPerimeter（）+"Ã×"）;

System.out.println（""）;

/*

*ÐÞ¸ÄĬÈÏÖµ

*/

rectangle1.setWidth（2.1）;

rectangle1.setHeight（3.2）;

rectangle1.setColor（"yellow"）;

System.out.println（"Ð޸ĺóµÄÖµ£º¿í="+rectangle1.getWidth（）+

"£¬¸ß="+rectangle1.getHeight（）+

",ÑÕɫΪ"+rectangle1.getColor（））;

System.out.println（"Ãæ»ý£º"+String.format（"%.2f",rectangle1.getArea（））+"ƽ·½Ã×"）;

System.out.println（"Öܳ¤£º"+String.format（"%.2f",rectangle1.getPerimeter（））+"Ã×"）;

}

}

packagecom.plural;

/**

*Createdbylpwon12/9/15.

*/

classPlural{

doublereal_part;

doubleimaginary_part;

publicPlural（）{

this.real_part=1.2;

this.imaginary_part=1.6;

}

publicPlural（doublereal_part,doubleimaginary_part）{

this.real_part=real_part;

this.imaginary_part=imaginary_part;

}

publicStringtoString（）{

return（"（"+real_part+"+"+imaginary_part+"i"+"）"）;

}

}

packagecom.plural;

importcom.plural.Plural;

/**

*Createdbylpwon12/9/15.

*/

classPluralOperation{

doublereal_part_addition;

doubleimaginary_part_addition;

doublereal_part_subtraction;

doubleimaginary_part_subtraction;

booleanequality;

publicStringaddPlural（Pluralp1,Pluralp2）{

this.real_part_addition=p1.real_part+p2.real_part;

this.imaginary_part_addition=p1.imaginary_part+p2.imaginary_part;

returnString.format（"%.2f",real_part_addition）+"+"+String.format（"%.2f",imaginary_part_addition）+"i";

}

publicStringsubPlural（Pluralp1,Pluralp2）{

this.real_part_subtraction=p1.real_part-p2.real_part;

this.imaginary_part_subtraction=p1.imaginary_part-p2.imaginary_part;

returnString.format（"%.2f",real_part_subtraction）+"+"+String.format（"%.2f",imaginary_part_subtraction）+"i";

}

publicbooleancmpPlural（Pluralp1,Pluralp2）{

equality=（p1.real_part==p2.real_part）&&（p1.imaginary_part==p2.imaginary_part）;

returnequality;

}

}

packagecom.plural;

importcom.plural.Plural;

importcom.plural.PluralOperation;

/**

*Createdbylpwon12/9/15.

*/

publicclassTest1_2{

publicstaticvoidmain（String[]args）{

Pluralp1=newPlural（）;

Pluralp2=newPlural（1.4,2.3）;

PluralOperationpo=newPluralOperation（）;

Stringstr1=p1.toString（）+"+"+p2.toString（）+"="+po.addPlural（p1,p2）;

System.out.println（str1）;

Stringstr2=p1.toString（）+"-"+p2.toString（）+"="+po.subPlural（p1,p2）;

System.out.println（str2）;

if（po.equality）

System.out.println（"Á½¸ö¸´ÊýÏàµÈ¡£"）;

else

System.out.println（"Á½¸ö¸´Êý²»ÏàµÈ¡£"）;

}

}

packagecom.pet;

/**

*Createdbylpwon12/9/15.

*/

classCatextendsPet{

Cat（Stringname）{

super（name）;

}

@Override

publicStringspeak（）{

return"MiaoMiao";

}

}

packagecom.pet;

/**

*Createdbylpwon12/9/15.

*/

classDogextendsPet{

protectedintweight;

publicDog（Strings）{

super（s）;

}

publicDog（Stringname,intweight,intwith）{

with=0;

this.name=name;

this.weight=weight;

}

publicDog（）{

}

publicintgetWeight（）{

returnweight;

}

publicvoidsetWeight（intweight）{

this.weight=weight;

}

@Override

publicStringspeak（）{

return"WoofWoof";

}

}

packagecom.pet;

/**

*Createdbylpwon12/9/15.

*/

classPet{

protectedStringname;

publicPet（）{//¸¸Àà±ØÐëÒªÓÐ×ÓÀà¿É·ÃÎʵÄÎ޲ι¹Ôì·½·¨

}

publicPet（Stringn）{

name=n;

}

publicStringgetName（）{

returnname;

}

publicStringmove（）{

return"run";

}

publicStringspeak（）{

return"";

}

publicStringtoString（）{

return"Mypet"+name;

}

}

packagecom.pet;

/**

*Createdbylpwon12/9/15.

*/

publicclassTest{

publicstaticvoidmain（String[]args）{

PetmyPet=newPet（"George"）;

PetmyDog=newPet（"Spot"）;

System.out.println（myPet.toString（）+"\n"+

"Speak:

"+myPet.speak（）+"\n"+

myPet.move（）+""+myPet.getName（）+"\n"）;

System.out.println（myDog.toString（）+"\n"+

"Speak:

"+myDog.speak（）+"\n"+

myDog.move（）+""+myDog.getName（）+"\n"）;

Petmypet1=newDog（）;

System.out.println（"PetÀà¶ÔÏómypet1speak:

"+mypet1.speak（））;

Petmypet2=newCat（"Mao"）;

System.out.println（"PetÀà¶ÔÏómypet2speak:

"+mypet2.speak（））;

}

}

packagesrc;

/**

*Createdbylpwon12/9/15.

*/

importjava.io.*;

importjava.io.BufferedReader;

importjava.io.FileReader;

importjava.io.FileWriter;

importjava.io.IOException;

publicclassSy3_1{

publicstaticvoidmain（String[]args）throwsIOException{

FileReaderin=newFileReader（"/home/lpw/AndroidStudioProjects/DisplayingBitmaps/lpwclass/src/main/java/src/Sy3_1.java"）;

BufferedReaderbin=newBufferedReader（in）;

FileWriterout=newFileWriter（"Sy3_1.txt",true）;

Stringstr;

while（（str=bin.readLine（））!

=null）{

System.out.println（str）;

out.write（str+"\n"）;

}

in.close（）;

out.close（）;

}

}

packagesrc;

/**

*Createdbylpwon12/9/15.

*/

importjava.io.DataInputStream;

importjava.io.DataOutputStream;

importjava.io.FileInputStream;

importjava.io.FileNotFoundException;

importjava.io.FileOutputStream;

importjava.io.IOException;

importjava.util.Arrays;

importjava.util.Scanner;

publicclassSy3_2{

staticint[]intArray=newint[20];

staticvoidReadIntFromConsole（）{

Scannersc=newScanner（System.in）;

System.out.println（"Pleaseinput20number:

"）;

for（inti=0;i<20;i++）

intArray[i]=sc.nextInt（）;

}

staticvoidWriteToFile（Stringf1,Stringf2）throwsIOException{

FileOutputStreamfout1=newFileOutputStream（f1）;

DataOutputStreamdout1=newDataOutputStream（fout1）;

FileOutputStreamfout2=newFileOutputStream（f2）;

DataOutputStreamdout2=newDataOutputStream（fout2）;

inti=0;

for（i=0;i<10;i++）{

dout1.writeInt（intArray[i]）;

dout2.writeInt（intArray[i+10]）;

}

dout1.close（）;

dout2.close（）;

fout1.close（）;

fout2.close（）;

}

staticvoidReadFromFile（Stringf,intnum）throwsIOException{

FileInputStreamfin=newFileInputStream（f）;

DataInputStreamdin=newDataInputStream（fin）;

for（inti=0;i

intArray[i]=din.readInt（）;

din.close（）;

fin.close（）;

}

staticvoidWriteToFile（Stringf,intnum,booleanflag）throwsIOException{

FileOutputStreamfout=newFileOutputStream（f,flag）;

DataOutputStreamdout=newDataOutputStream（fout）;

for（inti=0;i

dout.writeInt（intArray[i]）;

dout.close（）;

fout.close（）;

}

publicstaticvoidmain（String[]args）throwsIOException{

ReadIntFromConsole（）;

WriteToFile（"f1.dat","f2.dat"）;

ReadFromFile（"f1.dat",10）;

WriteToFile（"f2.dat",10,true）;

ReadFromFile（"f2.dat",20）;

Arrays.sort（intArray）;

WriteToFile（"f2.dat",20,false）;

ReadFromFile（"f2.dat",20）;

for（inti=0;i<20;i++）

System.out.println（intArray[i]+""）;

}

}

packagesrc;

importjava.io.DataOutputStream;

importjava.io.IOException;

import.ServerSocket;

import.Socket;

publicclassSimpleTCPServer{

publicstaticvoidmain（String[]args）throwsIOException{

ServerSocketserver=newServerSocket（8885）;

Socketsocket=server.accept（）;

Stringmsg="hello";

DataOutputStreamdos=newDataOutputStream（socket.getOutputStream（））;

dos.writeUTF（msg）;

dos.flush（）;

}

}

packagesrc;

importjava.io.DataInputStream;

importjava.io.IOException;

import.Socket;

import.UnknownHostException;

publicclassSimpleTCPClient{

publicstaticvoidmain（String[]args）throwsUnknownHostException,IOException{

Socketclient=newSocket（"localhost",8885）;

DataInputStreamdis=newDataInputStream（client.getInputStream（））;

Stringecho=dis.readUTF（）;

System.out.println（echo）;

}

}

packagesrc;

importjava.io.IOException;

import.DatagramPacket;

import.DatagramSocket;

import.InetSocketAddress;

publicclassSimpleUDPClient{

publicstaticvoidmain（String[]args）throwsIOException{

DatagramSocketclient=newDatagramSocket（6666）;

Stringmsg="udphello";

byte[]data=msg.getBytes（）;

DatagramPacketpacket=newDatagramPacket（data,data.length,newInetSocketAddress（"localhost",8888））;

client.send（packet）;

client.close（）;

}

}

packagesrc;

importjava.io.IOException;

import.DatagramPacket;

import.DatagramSocket;

importjava.util.Arrays;

publicclassSimpleUDPServer{

publicstaticvoidmain（String[]args）throwsIOException{

DatagramSocketserver=newDatagramSocket（8888）;

byte[]container=newbyte[1024];

DatagramPacketpacket=newDatagramPacket（container,container.length）;

server.receive（packet）;

byte[]data=packet.getData（）;

Sys