Java---IO流DateXxxStream

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package cn.hncu.io.demo2;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import javax.swing.JOptionPane;public class readWriteInt {    public static void main(String[] args) {        writeDemo();        readDemo();    }    private static void readDemo() {        try {            DataInputStream in = new DataInputStream(new FileInputStream("d:/a/files/int.txt"));            while(in.available()>0){//判断文件是否读取到末尾的方法                if(in.readInt()>1 && in.readInt()%50==0){                    System.out.println();                }                System.out.print(in.readInt()+" ");            }        } catch (FileNotFoundException e) {            JOptionPane.showMessageDialog(null, "文件没有找到!");        } catch (IOException e) {            System.out.println("文件读取时出现异常!");        }    }    private static void writeDemo() {        File file = new File("d:/a/files/int.txt");        DataOutputStream out = null;        try {            out = new DataOutputStream(new FileOutputStream(file));        } catch (FileNotFoundException e1) {            System.out.println("文件不存在!");        }        for (int i = 1; i < 300; i++) {            try {                out.writeInt(i);            } catch (IOException e) {                System.out.println("写文件时出现异常!");            }        }    }}
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