arraycopydemo3.java

西电科大的基于java面向对象教程

public class ArrayCopyDemo3 {
    public static void main(String[] args) {
        Object[] copyFrom = { new Object(),new Object(),new Object()};

        Object[] copyTo = new Object[3];
		//复制前两个数组对象的引用不同
		System.out.println("copyFrom="+copyFrom);
		System.out.println("copyTo="+copyTo);

		System.out.println("copy...");
        System.arraycopy(copyFrom, 0, copyTo, 0, 3);

        //复制后两个数组对象的引用仍然不同
		System.out.println("copyFrom="+copyFrom);
		System.out.println("copyTo="+copyTo);

		//复制后两个数组中每个对象的引用相同
		for(int i=0;i<copyFrom.length;i++){
        	System.out.print("copyFrom["+i+"]="+copyFrom[i]);
        	System.out.println("\tcopyTo["+i+"]="+copyTo[i]);
		}
    }
}