回忆（三）：通过反射得到有参构造实例化得到对象

package reflex;

import java.lang.reflect.Constructor;

/*
 * 需求：通过反射，获取该构造方法的使用
 * public Person(String name, int age, String address)
 * 
 * Person p = new Person("mzy", 19, "XXX-xxx-x");
 * sysout p 
 */
public class ReflectDemo03_newInstance_have_parameter {
	public static void main(String[] args) throws Exception {
		// 获取字节码文件对象
		Class c = Class.forName("reflex.Person");

		// 获取带参数的构造器
		Constructor con = c.getConstructor(String.class, int.class, 
				String.class);
		
		// 通过带参构造方法对象，创建对象
		Object obj = con.newInstance("mzy", 19, "XXX-xxx-x");
		System.out.println(obj);
		// 输出：Person [name=mzy, age=19, address=XXX-xxx-x]
	}
}

其中的person：

package reflex;

public class Person {
	// 成员变量
	private String name;
	int age;
	public String address;

	// 构造方法
	public Person() {
	}

	Person(String name, int age) {
		this.name = name;
		this.age = age;
	}
	private Person(String name) {
		this.name = name;
	}
	public Person(String name, int age, String address) {
		this.name = name;
		this.age = age;
		this.address = address;
	}

	// 成员方法
	public void show() {
		System.out.println("show");
	}

	public void method(String s) {
		System.out.println("method" + s);
	}

	public String getString(String s, int i) {
		return s + "---" + i;
	}

	@Override
	public String toString() {
		return "Person [name=" + name + ", age=" + age + ", address=" + address + "]";
	}

	private void function() {
		System.out.println("function");
	}

}