Inspecting Objects

• Can obtain object contents at runtime
• Useful for generic debugging tools
• Need to gain access to private fields
  

  Class c = obj.getClass(); 
  Field f = c.getDeclaredField(name); 
  f.setAccessible(true); 
  

• Throws exception if security manager disallows access
• Access field value:
  

  Object value = f.get(obj); 
  f.set(obj, value); 
  

• Use wrappers for primitive types