System.out.println(getMethod.invoke(obj));
} catch (NoSuchMethodException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (IllegalAccessException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (InvocationTargetException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
public static void setter(Object obj, String attr, Object value) {
try {
Class< > objClass = obj.getClass();
String methodName = "set" + attr.substring(0, 1).toUpperCase() + attr.substring(1);
Method setMethod = objClass.getMethod(methodName, value.getClass());
setMethod.invoke(obj,value);
} catch (NoSuchMethodException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (IllegalAccessException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (InvocationTargetException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
}
【结果：】
[html]
xiaozhang
男
【实例10】通过反射操作类的属性
[java]
public class ReflectTest {
public static void main(String[] args) {
Class< > personClass = null;
try {
personClass = Class.forName("org.zhang.test.Person");
Person person = (Person) personClass.newInstance();
person.setName("old name");
person.setSex("male");
System.out.println(person.getName());
Field nameField = personClass.getDeclaredField("name");
nameField.setAccessible(true);
nameField.set(person,"new name");
System.out.println(nameField.get(person));
} catch (InstantiationException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (IllegalAccessException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (ClassNotFoundException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (NoSuchFieldException e){
e.printStackTrace();
}
}
}
【结果：】
[html]
old name
new name
【实例11】通过反射，操作数组
[java]
public class ReflectTest {
public static void main(String[] args) {
int [] temp = {1,2,3,4,5};
Class< > tempClass = temp.getClass().getComponentType();
System.out.println("数组类型：" + tempClass.getName());
System.out.println("数组长度：" + Array.getLength(temp));
System.out.println("数组的第一个元素：" + Array.get(temp,0));
Array.set(temp,0,100);
System.out.println("修改后的第一个元素是：" + Array.get(temp,0));
}
}
【结果：】
[html]
数组类型：int
数组长度：5
数组的第一个元素：1
修改后的第一个元素是：100
【实例12】获取类加载器
[java]
public class ReflectTest {
public static void main(String[] args) {
Person p = new Person();
System.out.pri