用于操作基本类型数据的流对象

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用于操作基本类型数据的流对象

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/*
* 可以用于操作基本类型数据的流对象
*/
public class DataStreamDemo {
public static void main(String[] args) {
try {
writeData();
readData();
/*writeUTFDemo();
readUTFDemo();*/
} catch (IOException e) {
e.printStackTrace();
}
}
//写utf的过程
public static void writeUTFDemo() throws IOException{
DataOutputStream dos=new DataOutputStream(new FileOutputStream("d:\utf.txt"));
dos.writeUTF("你好");
dos.close();
}
//读utf的过程
public static void readUTFDemo() throws IOException{
DataInputStream dis=new DataInputStream(new FileInputStream("d:\utf.txt"));
System.out.println(dis.readUTF(dis));
dis.close();
}

//读的过程
public static void readData() throws IOException{
DataInputStream dis=new DataInputStream(new FileInputStream("d:\data.txt"));
int num=dis.readInt();
boolean b=dis.readBoolean();
double d=dis.readDouble();
System.out.println("num="+num);
System.out.println("b="+b);
System.out.println("d="+d);
dis.close();
}
//写的过程
public static void writeData()throws IOException {
DataOutputStream dos=new DataOutputStream(new FileOutputStream("d:\data.txt"));
dos.writeInt(123);
dos.writeBoolean(true);
dos.writeDouble(98.65);
}

}

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