Question

Hi I want to convert a class’s all String field values to their uppercase format. How can I do this? Please help.

Example:

public class ConvertStringToUppercase{
    private String field1; //to be converted Uppercase
    private String field2; //to be converted Uppercase
    private String field3; //to be converted Uppercase
    ...... //more fields
} 

Answer 1

You can use reflection for a quick and dirty solution:

ConvertStringToUpperCase t = new ConvertStringToUpperCase();
for(Field f: t.getClass().getDeclaredFields()) {            
    if(f.getType().equals(String.class)) {              
        f.setAccessible(true);
        f.set(t, ((String)f.get(t)).toUpperCase());
    }           
}

This is not a nice approach however, since private fields should not be modified this way.