e4_10.java

来自「java 初学者学习实例」· Java 代码 · 共 54 行

// Fig. 11.2: StringMiscellaneous.java
// This program demonstrates the length, charAt and getChars
// methods of the String class.
import javax.swing.*;
//StringMiscellaneous 
public class E4_10{

   public static void main( String args[] )
   {
      String s1 = "hello there";
      char charArray[] = new char[ 5 ];

      String output = "s1: " + s1;

      // test length method
      output += "\nLength of s1: " + s1.length();

      // loop through characters in s1 and display reversed
      output += "\nThe string reversed is: ";

      for ( int count = s1.length() - 1; count >= 0; count-- )
         output += s1.charAt( count ) + " ";

      // copy characters from string into charArray
      s1.getChars( 0, 5, charArray, 0 );
      output += "\nThe character array is: ";

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

      JOptionPane.showMessageDialog( null, output,
         "String class character manipulation methods",
         JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }

} // end class StringMiscellaneous

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