e4_9.java

来自「java 初学者学习实例」· Java 代码 · 共 51 行

// Fig. 11.1: StringConstructors.java
// String class constructors.
import javax.swing.*;
//StringConstructors 
public class E4_9 {

   public static void main( String args[] )
   {
      char charArray[] = { 'b', 'i', 'r', 't', 'h', ' ', 'd', 'a', 'y' };
      byte byteArray[] = { ( byte ) 'n', ( byte ) 'e', 
         ( byte ) 'w', ( byte ) ' ', ( byte ) 'y', 
         ( byte ) 'e', ( byte ) 'a', ( byte ) 'r' };

      String s = new String( "hello" );

      // use String constructors
      String s1 = new String();
      String s2 = new String( s );
      String s3 = new String( charArray );
      String s4 = new String( charArray, 6, 3 );
      String s5 = new String( byteArray, 4, 4 );
      String s6 = new String( byteArray );

      // append Strings to output
      String output = "s1 = " + s1 + "\ns2 = " + s2 + "\ns3 = " + s3 + 
         "\ns4 = " + s4 + "\ns5 = " + s5 + "\ns6 = " + s6;

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

      System.exit( 0 );
   }

} // end class StringConstructors


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