在Java中的对象数组内初始化整数时，出现“类型不匹配：无法从int转换为Object”错误

Question

public class objArrayPractice {
    public static void main(String[] args) {
        Object ar []= new Object [4];
        ar[0]= 12;
    }
}

when I write ar[0]= 12; I am getting the error: "Type mismatch: cannot convert from int to Object"

Answer 1

To convert 12 into an object you need al least Java 1.5, this is called Autoboxing

Autoboxing and unboxing was introduced in Java 1.5 to automatically convert primitive type into boxed primitive( Object or Wrapper class)

So be sure to have on both machines a Java version >= 1.5