Array Reflection: create instance : Array Reflection « Reflection « Java
Array Reflection: create instance
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import java.lang.reflect.Array;
public class SampleCreateArrayReflection {
public static void main(String[] args) {
int[] originalArray = { 55, 66 };
int[] biggerArray = (int[]) doubleArray(originalArray);
System.out.println("originalArray:");
for (int k = 0; k < Array.getLength(originalArray); k++)
System.out.println(originalArray[k]);
System.out.println("biggerArray:");
for (int k = 0; k < Array.getLength(biggerArray); k++)
System.out.println(biggerArray[k]);
}
static Object doubleArray(Object source) {
int sourceLength = Array.getLength(source);
Class arrayClass = source.getClass();
Class componentClass = arrayClass.getComponentType();
Object result = Array.newInstance(componentClass, sourceLength * 2);
System.arraycopy(source, 0, result, 0, sourceLength);
return result;
}
}
