//从文件里读数据，显示到屏幕上

package com.yourcompany.core;

import java.io.*;

public class Think {

public static void main(String[] args) {

try {

FileInputStream file = new FileInputStream("d:\\sss.txt");

char[] c = new char[file.available()];

for (int i = 0 ; i

c[i] = (char)file.read();

}

System.out.print(c);

}

catch(FileNotFoundException e) {

e.printStackTrace();

}

catch(IOException e) {

e.printStackTrace();

}

}

}

//在屏幕上写东西到文件中

package com.yourcompany.core;

import java.io.*;

import java.util.*;

public class Think {

public static void main(String[] args) {

try {

byte[] c = new byte[1000] ;

System.in.read(c);

FileOutputStream file = new FileOutputStream("d:\\s.txt");

file.write(c);

}

catch(Exception e) {

e.printStackTrace();

}

}

}

//从一个文件复制到另一个文件

package com.yourcompany.core;

import java.io.*;

import java.util.*;

public class Think {

public static void main(String[] args) {

try {

FileInputStream file = new FileInputStream("d:\\sss.txt");

FileOutputStream fileout = new FileOutputStream("d:\\aaa.txt");

byte[] c = new byte[file.available()];

for(int i = 0;i

c[i] = (byte)file.read();

}

fileout.write(c);

}

catch(Exception e) {

e.printStackTrace();

}

}

}

//在屏幕上你输入什么我就输入什么

package com.yourcompany.core;

import java.io.*;

import java.util.*;

public class Think {

public static void main(String[] args) {

try {

byte [] c = new byte[1000];

int cc = System.in.read(c);

for (int i=0;i

System.out.print((char)c[i]);

}

}

catch(Exception e) {

e.printStackTrace();

}

}

}