泛型數組及泛型的嵌套設置

一 、接收和返回泛型數組

public class GenericsDemo29 {
    public static void main(String[] args) {
        Integer i[] = fun1(1,2,3,4,5,6);
        fun2(i);
    }
    public static <T> T[] fun1(T...arg){
        return arg;
    }
    public static <T> void fun2(T param[]){
        System.out.println("接收泛型數組");
        for(T t : param){
            System.out.print(t + "、");
        }
        System.out.println();
    }
}

程序運行結果：

二 、泛型的嵌套設置

class Info<T,V>{
    private T var;
    private V value;

    public Info(T var, V value) {
        this.var = var;
        this.value = value;
    }

    public T getVar() {
        return var;
    }

    public void setVar(T var) {
        this.var = var;
    }

    public V getValue() {
        return value;
    }

    public void setValue(V value) {
        this.value = value;
    }
}

class Demo<S> {
    private S info;

    public Demo(S info) {
        this.info = info;
    }

    public S getInfo() {
        return info;
    }

    public void setInfo(S info) {
        this.info = info;
    }
}

public class GenericsDemo30 {
    public static void main(String[] args) {
        Info<String,Integer> i = new Info<String,Integer>("張三",20);
        Demo<Info<String,Integer>> d = new Demo<Info<String,Integer>>(i);
        System.out.println(d.getInfo().getVar());
        System.out.println(d.getInfo().getValue());
    }
}

程序運行結果：