DataOutputStream和DataInputStream使用的例子

王朝other·作者佚名  2008-05-31
窄屏简体版  字體: |||超大  

import Java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.EOFException;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

public class DataIODemo1 {

public static void main(String[] args) throws IOException {

DataOutputStream out = new DataOutputStream(new FileOutputStream(

"Java2s.txt"));

double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };

int[] units = { 12, 8, 13, 29, 50 };

String[] descs = { "Java", "Source ", "and",

"Support."};

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

out.writeDouble(prices[i]);

out.writeChar('\t');

out.writeInt(units[i]);

out.writeChar('\t');

out.writeChars(descs[i]);

out.writeChar('\n');

}

out.close();

// read it in again

DataInputStream in = new DataInputStream(new FileInputStream(

"Java2s.txt"));

double price;

int unit;

String desc;

double total = 0.0;

try {

while (true) {

price = in.readDouble();

in.readChar(); // throws out the tab

unit = in.readInt();

in.readChar(); // throws out the tab

desc = in.readLine();

System.out.println( unit );

System.out.println( desc );

System.out.println( desc );

total = total + unit * price;

}

} catch (EOFException e) {

}

in.close();

}

}

 
 
 
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