zuoye1.java

本程序可以将1-256进制之间的数在二进制

// Fig. 5.15:Zuoye1.java
// display the 2\8\16

import java.util.Locale;  // class for country-specific information
import javax.swing.*;



public class Zuoye1 {

   public static void main( String args[] )
   {
      
      
      // create JTextArea to display output
      JTextArea outputTextArea = new JTextArea(20,30);
      JScrollPane scroller = new JScrollPane();

      // set first line of text in outputTextArea
      outputTextArea.setText( "  十进制\t二进制\t八进制\t十六进制\n" );
        
      for ( int number = 1; number <= 256; number++ ) 
      {
         
         String decimalNum=Integer.toString(number);
         String binaryNum=Integer.toBinaryString(number);
         String octalNum=Integer.toOctalString(number);
         String hexNum=Integer.toHexString(number);
         

         // append one line of text to outputTextArea
         outputTextArea.append( "  " + decimalNum+ "\t" +
         binaryNum +"\t"+ octalNum +"\t"+ hexNum +"\n");

      } // end for 
      
      
      //将JTextArea嵌入到JScrollpane中
      scroller.getViewport().setView(outputTextArea);
     
     
      // display results
      JOptionPane.showMessageDialog( null, scroller,
      "1-256 进制转换", JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );  

   } // end main
}