public class generictostring {

  String hello = "world";
  int i = 42;

  public static void main(String args []) {
      System.out.println(new generictostring().toString());
      // generictostring{i=42, hello=world}
  }

  public String toString() {
   java.util.Hashtable h = new java.util.Hashtable();
   Class cls = getClass();
   java.lang.reflect.Field[] f = cls.getDeclaredFields();
   java.lang.reflect.AccessibleObject.setAccessible(f, true); //jdk1.2
   for (int i = 0; i < f.length; i++) {
       try {
          h.put(f[i].getName(),f[i].get(this));
       }
       catch (IllegalAccessException e) {
          e.printStackTrace();
       }
   }
   if (cls.getSuperclass().getSuperclass() != null) {
      h.put("super", super.toString());
      }
   return cls.getName() + h;
  }
}

// @author Christian Ullenboom
// @url http://java-tutor.com
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.util.ArrayList;

class ToStringHelper {
 public static String toString( Object o ) {
   ArrayList list = new ArrayList();
   toString( o, o.getClass(), list );
   return o.getClass().getName().concat( list.toString() );
   }

 private static void toString( Object o, Class clazz, ArrayList list ) {
   Field f[] = clazz.getDeclaredFields();
   AccessibleObject.setAccessible( f, true );
   for ( int i = 0; i < f.length; i++ ) {
     try {
       list.add( f[i].getName() + "=" + f[i].get(o) );
       }
     catch ( IllegalAccessException e ) { e.printStackTrace(); }
     }
     if ( clazz.getSuperclass().getSuperclass() != null )
        toString( o, clazz.getSuperclass(), list );
     }
}

class Ober {
  int i = 123;
  private double d = 3.1415;
}

public class ToStringHelperTest extends Ober {
  String hello = "world";
  int i = 42;
 
  public static void main(String args[]) {
    Ober t = new ToStringHelperTest();
    System.out.println( ToStringHelper.toString(t) );
    // ToStringHelperTest[hello=world, i=42, i=123, d=3.1415]
    }
}