本文通过一个简单的Java程序展示了如何使用System.arraycopy方法来复制数组，并将结果输出到控制台。该示例有助于理解数组操作的基本概念。
[code]public static void main(String[] args) {
//MessageProcessor mp = new MessageProcessor();
String[] a = {"aa","bb","cc","dd"};
String[] b = new String[a.length-2];
System.arraycopy(a,0,b,0,b.length);
System.out.println(b[0]+b[1]);
}[/code]
//MessageProcessor mp = new MessageProcessor();
String[] a = {"aa","bb","cc","dd"};
String[] b = new String[a.length-2];
System.arraycopy(a,0,b,0,b.length);
System.out.println(b[0]+b[1]);
}[/code]
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