存储类实现接口(interface)时出现 Java ArrayStoreException

Question

您好，当我尝试将实现接口(interface)的类存储到定义为接口(interface)数组的数组中时，我收到此 Java ArrayStoreException 异常。代码如下:

private Individual[] individuals;
/*
* other fields and methods here
*/

//This method runs alright
public void initializePopulationBinary() {
    for(int i = 0; i < sizeOfPopulation; i++) {
        BinaryIndividual individual = new BinaryIndividual();
        individual.generateRandomIndividual();
        this.individuals[i] = individual;
    }
}
//This methods throws exception
public void initializePopulationString() {
    for(int i = 0; i < sizeOfPopulation; i++) {
        StringIndividual individual = new StringIndividual();
        individual.generateRandomIndividual();
        this.individuals[i] = individual;
    }
}

Individual 是 BinaryIndi​​vidual 和 StringIndividual 类都实现的接口(interface)。问题出在哪里？

Answer 1

来自 ArrayStoreException 文档:

Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects.

我的猜测是你在像这样的地方初始化个体:

individuals = new BinaryIndividual[someLength];

尝试以这种方式初始化它:individuals = new individual[someLength];