ex6_8.java

Java与面向对象程序设计实验教学讲义.复数类的实现,复数类的复杂运算,身份证号码的分析,图形界面设计

import java.io.*; 
class Ex6_8{
  public static void main ( String[] args ) throws IOException {
    	String fileName = "mixedTypes.dat" ;
    	DataOutputStream dataOut = new DataOutputStream(
                             new BufferedOutputStream(
                               new FileOutputStream( fileName  ) ) );
    	dataOut.writeInt( 0 );
    	System.out.println( dataOut.size()  + " bytes have been written.");
    	dataOut.writeDouble( 31.2 );
    	System.out.println( dataOut.size()  + " bytes have been written.");
    	dataOut.writeBytes("JAVA");
    	System.out.println( dataOut.size()  + " bytes have been written.");
    	dataOut.close();
  }
}