package c;

public class So {
    private final String name= "sss";
    
    //如果String创建时new的话，反射就能改变
    //private final String name= new String("sss");
    
    public void t(){
        System.out.println(name);
    }

}

package c;

import java.lang.reflect.Field;

public class Test {
    public static void main(String[] args) throws Exception {
        Class c = So.class;
        Field field  = c.getDeclaredField( "name");
        field.setAccessible(true);
        So so = new So();
        System.out.println(field.get(so));
        field.set(so,  "aa");
        System.out.println(field.get(so));
        so.t();
        
        
    }

}