java的io简单应用 选择自 FrankTaylor 的 Blog
2008-01-05 18:36:53 来源:WEB开发网 闂傚倸鍊搁崐鎼佸磹閹间礁纾归柟闂寸绾剧懓顪冪€n亜顒㈡い鎰Г閹便劌顫滈崱妤€骞婄紓鍌氬€瑰銊╁箟缁嬫鍚嬮柛顐線缂冩洟姊婚崒娆戭槮婵犫偓闁秵鎯為幖娣妼缁愭鏌″搴′簽濞戞挸绉甸妵鍕冀椤愵澀娌梺缁樻尪閸庣敻寮婚敐澶婂嵆闁绘劖绁撮崑鎾诲捶椤撴稑浜炬慨妯煎亾鐎氾拷

//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.length;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.length;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<cc;i++) {
System.out.print((char)c[i]);
}
}
catch(Exception e) {
e.printStackTrace();
}
}
}
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