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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.lang.reflect.*;
  4.  
  5. class Main
  6. {
  7.  
  8. 	public static void main (String[] args) throws java.lang.Exception
  9. 	{
  10. 	    Source source = new Source();
  11.         Destination destination = new Destination();
  12.  
  13.  
  14.         Class sourceClassObject = source.getClass();
  15.         Class destClassObject = destination.getClass();
  16.         Field[] sourceFields = sourceClassObject.getDeclaredFields();
  17.         Field[] destFields = destClassObject.getDeclaredFields();
  18.  
  19.         for (Field fieldSrc : sourceFields) {
  20.             int mod = fieldSrc.getModifiers();  // get modifiers
  21.             System.out.print("Source Field: " + Modifier.toString(mod) + " "
  22.               + fieldSrc.getType() + " " + fieldSrc.getName());
  23.             fieldSrc.setAccessible(true);
  24.             System.out.println(" [" + fieldSrc.get(source) + "]");
  25.             for (Field fieldDest : destFields){
  26.                 if (fieldDest.getType().equals(fieldSrc.getType()) && 
  27.                     fieldDest.getName().equals(fieldSrc.getName())){
  28.                     fieldDest.setAccessible(true);
  29.                     fieldDest.set(destination, fieldSrc.get(source));
  30.                 }                
  31.             }
  32.         }
  33.  
  34.         destination.printValues();
  35.     }
  36.  
  37.     static class Source{        
  38.  
  39.         public Source(){
  40.             strField = "This is a String";
  41.             intField = 42;
  42.             dateField = new Date();
  43.         }
  44.  
  45.         private String  strField;
  46.         private Integer intField;
  47.         private Date    dateField;
  48.     }
  49.  
  50.     static class Destination{        
  51.         private String  strField;
  52.         private Integer intField;
  53.         private Date    dateField;
  54.  
  55.         public void printValues(){
  56.             System.out.println("Destination Field values: ");
  57.             System.out.println("strField: " + strField);
  58.             System.out.println("intField: " + intField);
  59.             System.out.println("dateField: " + dateField);
  60.         }
  61.     }    
  62. }
Success #stdin #stdout 0.1s 380864KB
comments (?)
stdin 
Standard input is empty
stdout 
Source Field: private class java.lang.String strField [This is a String]
Source Field: private class java.lang.Integer intField [42]
Source Field: private class java.util.Date dateField [Mon Feb 04 14:02:31 GMT 2013]
Destination Field values: 
strField: This is a String
intField: 42
dateField: Mon Feb 04 14:02:31 GMT 2013
https://ideone.com/IUS35Z
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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