stringmisc2.java

我在学习JAVA的讲义

import javax.swing.*;

public class StringMisc2 {
   public static void main( String args[] )
   {
      String s1 = new String( "hello" ),
             s2 = new String( "GOOD BYE" ),
             s3 = new String( "   spaces   " ),
             output;

      output = "s1 = " + s1 +
               "\ns2 = " + s2 +
               "\ns3 = " + s3;

      // test method replace      
      output += "\n\nReplace 'l' with 'L' in s1: " +
                s1.replace( 'l', 'L' );

      // test toLowerCase and toUpperCase
      output +=
         "\n\ns1.toUpperCase() = " + s1.toUpperCase() +
         "\ns2.toLowerCase() = " + s2.toLowerCase();

      // test trim method
      output += "\n\ns3 after trim = \"" + s3.trim() + "\"";

      // test toString method
      output += "\n\ns1 = " + s1.toString();

      // test toCharArray method
      char charArray[] = s1.toCharArray();
      output += "\n\ns1 as a character array = ";

      for ( int i = 0; i < charArray.length; ++i )
         output += charArray[ i ];

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

      System.exit( 0 );
   }
}