stringvalueof.java

我在学习JAVA的讲义

import javax.swing.*;

public class StringValueOf {
   public static void main( String args[] )
   {
      char charArray[] = { 'a', 'b', 'c', 'd', 'e', 'f' };
      boolean b = true;
      char c = 'Z';
      int i = 7;
      long l = 10000000;
      float f = 2.5f;
      double d = 33.333;
      Object o = "hello";  // Assign to an Object reference
      String output;

      output = "char array = " + String.valueOf( charArray ) +
               "\npart of char array = " +
               String.valueOf( charArray, 3, 3 ) +
               "\nboolean = " + String.valueOf( b ) +
               "\nchar = " + String.valueOf( c ) +
               "\nint = " + String.valueOf( i ) +
               "\nlong = " + String.valueOf( l ) + 
               "\nfloat = " + String.valueOf( f ) + 
               "\ndouble = " + String.valueOf( d ) + 
               "\nObject = " + String.valueOf( o );

      JOptionPane.showMessageDialog( null, output,
         "Demonstrating String Class valueOf Methods",
         JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }
}