e4_14.java

来自「java 初学者学习实例」· Java 代码 · 共 41 行

// Fig. 11.6: SubString.java
// String class substring methods.
import javax.swing.*;
//SubString 
public class E4_14 {

   public static void main( String args[] )
   {
      String letters = "abcdefghijklmabcdefghijklm";

      // test substring methods
      String output = "Substring from index 20 to end is " +
         "\"" + letters.substring( 20 ) + "\"\n";

      output += "Substring from index 3 up to 6 is " +
         "\"" + letters.substring( 3, 6 ) + "\"";

      JOptionPane.showMessageDialog( null, output,
         "String substring methods", JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }

} // end class SubString


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