泛型

package Generics;
//泛型类   就是属性的数据类型不确定, 在创建对象的时候再确定.
public class a1<T> {    //属性类型是<T>泛型   
    private T name;

    public T getName() {
        return name;
    }

    public void setName(T name) {
        this.name = name;
    }
}
//------------------------------
package Generics;
//必须是引用类型,比如:String, class类型, 基本类型要用包装类如Integer, Boolean...
public class a1Demo {
    public static void main(String[] args) {
        a1<String> a = new a1<String>();
        a.setName("abc");
        a1<Integer> i = new a1<Integer>();
        i.setName(100);
        a1<Boolean> b = new a1<Boolean>();
        b.setName(true);
        System.out.println(a.getName()+","+i.getName()+","+b.getName()+",");
    }
}