构造泛型类型变量数组

public class Test07 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String[] strs=arrayT(String[]::new,"chen","shao","xiu");
        System.out.println(Arrays.toString(strs));   //[chen, shao, xiu]
        
        Integer[] ins=arrayT(Integer[]::new,1,2,3,6,5,4);
        System.out.println(Arrays.toString(ins));    //[1, 2, 3, 6, 5, 4]
    }    
    
    
    //需要提供一个构造器表达式
    @SafeVarargs
    public static <T> T[] arrayT(IntFunction<T[]> constr,T...ts){
        if(ts==null)
            return null;
        int length=ts.length;
        T[] arrt=constr.apply(length);
        for(int i=0;i<length;i++){
            arrt[i]=ts[i];
        }
        return arrt;
    }
}