标签:port exce etl private 效果图 print declare .com images
原文地址:
http://blog.csdn.net/qustmeng/article/details/54691933
对于类的私有属性,如果没有提供公用方法去修改它,我们可以通过反射方法实现。下面为简单例子
import java.util.ArrayList; import java.util.List; public class A { private List<Integer> list = new ArrayList<Integer>(); public List<Integer> getList() { return list; } }
import java.lang.reflect.Field;
import java.util.List;
public class Test {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
A a = new A();
try {
Field field = A.class.getDeclaredField("list");
field.setAccessible(true);
List<Integer> myList = (List<Integer>) field.get(a);
myList.add(1);
myList.add(2);
myList.add(3);
myList.add(4);
myList.add(5);
for (Integer i : a.getList()) {
System.out.println(i);
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
效果图:
标签:port exce etl private 效果图 print declare .com images
原文地址:http://www.cnblogs.com/devilmaycry812839668/p/6937289.html