Java-泛型示例

1.在方法中定义

public class ReGen1 <T>{

T ob; //定义泛型的成员变量ob public ReGen1(T ob){ //参数化 this.ob = ob; } public void showType(){ System.out.println("T的实际类型是："+ob.getClass().getName());  System.out.println("值是："+ob); } public static void main(String[] args) { new ReGen1<Integer>(4854).showType(); new ReGen1<Boolean>(true).showType(); new ReGen1<String>("afe").showType(); }

}

2..在类中定义

public class ReGenericTest { public static <A,B> void myMui(A a,B b){ if(a.equals(b)) System.out.println(a+"与"+b+"相等"); else System.out.println(a+"与"+b+"不等"); } public static void main(String[] args) { myMui("2",2); myMui(2,2); myMui("2","2"); } }