java实现非法访问异常示例

import java.lang.reflect.Field;

public class ExceptionTest {
    public static void main(String[] args) {
        Class<?> clazz = String.class;                        //获得代表String类的类对象
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {                            //遍历所有域        
            System.out.println(field);
            if (field.getName().equals("hash")) {               //如果域的名字是hash
                try {
                    System.out.println(field.getInt("hash"));   // 输出hash的值
                } catch (IllegalArgumentException e) {      //捕获IllegalArgumentException异常
                    System.out.println(e);
                } catch (IllegalAccessException e) {            //捕获IllegalAccessException异常
                    System.out.println(e);
                }
            }
        }
    }
}