89、java的IO操作-基本数据操作流

/*
* 可以读写基本数据类型的数据
* 数据输入流：DataInputStream
* 			DataInputStream(InputStream in)
* 数据输出流：DataOutputStream
* 			DataOutputStream(OutputStream out)
*/
public class DataStreamDemo {
public static void main(String[] args) throws IOException {
// 写
// write();

// 读
read();
}

private static void read() throws IOException {
// DataInputStream(InputStream in)
// 创建数据输入流对象
DataInputStream dis = new DataInputStream(
new FileInputStream("dos.txt"));

// 读数据
byte b = dis.readByte();
short s = dis.readShort();
int i = dis.readInt();
long l = dis.readLong();
float f = dis.readFloat();
double d = dis.readDouble();
char c = dis.readChar();
boolean bb = dis.readBoolean();

// 释放资源
dis.close();

System.out.println(b);
System.out.println(s);
System.out.println(i);
System.out.println(l);
System.out.println(f);
System.out.println(d);
System.out.println(c);
System.out.println(bb);
}

private static void write() throws IOException {
// DataOutputStream(OutputStream out)
// 创建数据输出流对象
DataOutputStream dos = new DataOutputStream(new FileOutputStream(
"dos.txt"));

// 写数据了
dos.writeByte(10);
dos.writeShort(100);
dos.writeInt(1000);
dos.writeLong(10000);
dos.writeFloat(12.34F);
dos.writeDouble(12.56);
dos.writeChar('a');
dos.writeBoolean(true);

// 释放资源
dos.close();
}
}