e10_4.java

来自「java 初学者学习实例」· Java 代码 · 共 32 行

import java.io.*;
public class E10_4
{public static void main(String args[])
  {try
      {FileOutputStream fos=new FileOutputStream("jerry.dat");
       DataOutputStream out_data=new DataOutputStream(fos);
       out_data.writeInt(100);out_data.writeInt(10012);
       out_data.writeLong(123456);
       out_data.writeFloat(3.1415926f); out_data.writeFloat(2.789f);
       out_data.writeDouble(987654321.1234);
       out_data.writeBoolean(true);out_data.writeBoolean(false);
       out_data.writeChars("i am ookk");
    }
   catch(IOException e){}
   try
   { FileInputStream fis=new FileInputStream("jerry.dat");
       DataInputStream in_data=new DataInputStream(fis);
       System.out.println(":"+in_data.readInt()); 
       System.out.println(":"+in_data.readInt()); 
       System.out.println(":"+in_data.readLong());   
       System.out.println(":"+in_data.readFloat()); 
       System.out.println(":"+in_data.readFloat()); 
       System.out.println(":"+in_data.readDouble());
       System.out.println(":"+in_data.readBoolean()); 
       System.out.println(":"+in_data.readBoolean());
       char c;
      while((c=in_data.readChar())!='\n')  //\0表示没有空字符
       System.out.print( " " + c +".");
  }
   catch(IOException e){}
  }
}