Java通过反射访问私有成员变量和私有方法

package ztest;

public class PrivateCar {
	
	private String owner;
	
	private void getDesc(){
		System.out.println("owner : "+this.owner);
	}

}
package ztest;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class PrivateCarTest {
	
	public static void main(String[] args) throws Exception {
		
		ClassLoader loader = Thread.currentThread().getContextClassLoader();
		Class classCar = loader.loadClass("ztest.PrivateCar");//类的完整路径
		
		PrivateCar pcar =(PrivateCar) classCar.newInstance();
		
		Field fOwner = classCar.getDeclaredField("owner");//通过名字加载
		fOwner.setAccessible(true);//设为可访问
		fOwner.set(pcar, "史泰龙");
		
		Method getDesc = classCar.getDeclaredMethod("getDesc", null);
		getDesc.setAccessible(true);
		getDesc.invoke(pcar, null);
	}
}

输出结果

owner : 史泰龙


证明类的私有成员变量和私有方法可以访问

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