e4_12.java

来自「java 初学者学习实例」· Java 代码 · 共 58 行

// Fig. 11.4: StringStartEnd.java
// String methods startsWith and endsWith.
import javax.swing.*;
//StringStartEnd 
public class E4_12{

   public static void main( String args[] )
   {
      String strings[] = { "started", "starting", "ended", "ending" };
      String output = "";

      // test method startsWith
      for ( int count = 0; count < strings.length; count++ )

         if ( strings[ count ].startsWith( "st" ) )
            output += "\"" + strings[ count ] + "\" starts with \"st\"\n";

      output += "\n";

      // test method startsWith starting from position
      // 2 of the string
      for ( int count = 0; count < strings.length; count++ )

         if ( strings[ count ].startsWith( "art", 2 ) ) 
            output += "\"" + strings[ count ] +
               "\" starts with \"art\" at position 2\n";

      output += "\n";

      // test method endsWith
      for ( int count = 0; count < strings.length; count++ )

         if ( strings[ count ].endsWith( "ed" ) )
            output += "\"" + strings[ count ] + "\" ends with \"ed\"\n";

      JOptionPane.showMessageDialog( null, output,
         "String Class Comparisons", JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }

} // end class StringStartEnd

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