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在泛型方法中返回泛型数组

正常情况下,泛型数组是无法初始化的,比方这样T [] a=new T[5] ,就会报错;

但是通过反射可以实现泛型数组。代码如下:

/**
 * Created by wangbin10 on 2019/1/2.
 * 在泛型方法中返回泛型数组
 */
public class Test {

    public static void main(String[] args) {
        Integer[] x = {1, 3, 5, 7};
        Integer[] y = {2, 4, 6, 8};
        Integer[] merge = merge(x, y);
        System.out.println(Arrays.toString(merge));
    }

    public static <T> T[] merge(T [] x,T[] y) {
        int z=x.length+y.length;
        T[] ts = (T[]) Array.newInstance(x.getClass().getComponentType(), z);
        for (int i = 0; i < x.length; i++) {
            ts[i]=x[i];
        }
        for(int j=0;j<y.length;j++) {
            ts[j+y.length]=y[j];
        }

        return ts;
    }
}

 

转载于:https://www.cnblogs.com/wangbin2188/p/10210499.html

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