import java.io.*; 

/** 
* Java读取解析二进制数据 
* 
* @author leizhimin 2008-10-14 12:42:51 
*/ 
public class TestLicenses { 
        public static void main(String[] args) throws IOException { 
                testDataOutputStream(); 
                testDataInputStream(); 
        } 

        /** 
         * 生成二进制数据文件 
         * 
         * @throws IOException 
         */ 
        public static void testDataOutputStream() throws IOException { 
                DataOutputStream dos = new DataOutputStream(new FileOutputStream("C:\\dos.dat")); 
                dos.writeBoolean(true); 
                dos.writeByte('a'); 
                dos.writeDouble(234.44); 
                dos.writeFloat(11.23f); 
                dos.writeLong(555L); 
                dos.writeInt(333); 
                dos.writeShort(23); 
                dos.writeUTF("UTFString"); 
                dos.close(); 
        } 

        /** 
         * 解析二进制数据文件 
         * 
         * @throws IOException 
         */ 
        public static void testDataInputStream() throws IOException { 
                DataInputStream dis = new DataInputStream(new FileInputStream("C:\\dos.dat")); 
                System.out.println(dis.readBoolean()); 
                System.out.println((char) dis.readByte()); 
                System.out.println(dis.readDouble()); 
                System.out.println(dis.readFloat()); 
                System.out.println(dis.readLong()); 
                System.out.println(dis.readInt()); 
                System.out.println(dis.readShort()); 
                System.out.println(dis.readUTF()); 
                dis.close(); 
        } 
}

true 
a 
234.44 
11.23 
555 
333 
23 
UTFString 

Process finished with exit code 0