Java的反射(reflection)

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反射的语句非常简单,例如以下这句就可以根据Dog的类名来创建Dog对象:

Dog dog = (Dog) (Class.forName("reflection.Dog").newInstance())

 

全例：

Dog类：

package reflection;

public class Dog {

	private String name;
	private int age;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

}

 反射类：

package reflection;

public class ReflectionTest {

	/**
	 * @param args
	 * @throws ClassNotFoundException
	 * @throws IllegalAccessException
	 * @throws InstantiationException
	 */
	public static void main(String[] args) throws InstantiationException,
			IllegalAccessException, ClassNotFoundException {
		Dog dog = (Dog) (Class.forName("reflection.Dog").newInstance());
		dog.setName("wang");
		dog.setAge(1);
		System.out.println("My dog is:" + dog.getName() + ", he is "
				+ dog.getAge() + " years old.");
	}

}

 结果打印：

My dog is:wang, he is 1 years old.