一篇文章带你了解java泛型--泛型类,泛型方法,泛型接口

public class Myname <K,V> 

public class FanXingLei<T> {
	public T getE(T t)
	{
		return t;
	}
}

public class Student {
public String name;
public 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;
}
public Student(String name, int age) {
	super();
	this.name = name;
	this.age = age;
}
@Override
public String toString() {
	return "Student [name=" + name + ", age=" + age + "]";
}
}	

public class Teacher {
	
public String name;
public 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;
}
public Teacher(String name, int age) {
	super();
	this.name = name;
	this.age = age;
}
@Override
public String toString() {
	return "Teacher [name=" + name + ", age=" + age + "]";
}
}

public static void main(String[] args) {
		FanXingLei<Student> stu=new FanXingLei<Student>();
		
		Student student=new Student("小明", 20);
		Teacher teacher=new Teacher("小红", 27);
		FanXingLei<Teacher> tu=new FanXingLei<Teacher>();
		System.out.println(stu.getE(student).getClass().getName());
		System.out.println(tu.getE(teacher).getClass().getName());
		
		System.out.println(stu.getE(student).toString());
		System.out.println(tu.getE(teacher).toString());
	}
}

public static <E> E getMax(T...in)   //三个点表示为多个参数

public class Test {
	public static void main(String[] args) {
		print("你好");
		print(200);
		print(true);
		print(99.9);
}
    
public static <T> void print(T t) {
	System.out.println(t);
}
}

public interface IFanXingJieKou<T>

public interface IFanXingJieKou <T> {
	public T read(T t);	
}

public class FanXingImpl implements IFanXingJieKou<String> {
	@Override
	public String read(String t) {
		return t;
	}
}

public class Test {
	public static void main(String[] args) {
		IFanXingJieKou<String> fK=new FanXingImpl();
		System.out.println(fK.read("hello"));
	}
}