Java泛型

JDK1.5开始出现了一种新的技术——泛型，此技术的最大特点就是类中的属性的类型可以由外部决定，在声明类的时候应该采用这样的格式：
　　class 类名称 <泛型类型，泛型类型....>{
　　}
这里给大家举个实例说明其作用：

 定义一个Point<T>类:

public class Point<T> {
	private T X;
	private T Y;
	public T getX() {
		return X;
	}
	public void setX(T x) {
		X = x;
	}
	public T getY() {
		return Y;
	}
	public void setY(T y) {
		Y = y;
	}
	public Point(T x, T y) {
		super();
		X = x;
		Y = y;
	}
	@Override
	public String toString(){
		return X + "|" + Y;
	}
}

对于Person类：

public class Person {
	private int age;
	private int height;

	public int getAge() {
		return age;
	}

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

	public int getHeight() {
		return height;
	}

	public void setHeight(int height) {
		this.height = height;
	}

	public Person(int age, int height) {
		super();
		this.age = age;
		this.height = height;
	}

	@Override
	public String toString(){
		return this.getAge()+"|"+this.getHeight();
	}
}


测试类：
public class Main {

	public static void main(String[] args) {
		Point<String> p1 = new Point<String>("Hello", "World");
		System.out.println(p1);
		
		Point<Integer> p2 = new Point<Integer>(65, 78);
		System.out.println(p2);
		
		Point<Person> p3 = new Point<Person>(new Person(64,65), new Person(77,88));
		System.out.println(p3);
	}
}