java arraycopy()
System.arraycopy()
System.arraycopy(digest, index1, frame, index2, digest.length);
// 把digest中的内容从第index1个开始复制到frame中去，从frame的第index2开始，总共要复制的长度为 digest.length
public class Main {
public static void main(String[] args) {
String[] names = new String[] { "A", "B", "C" };
String[] extended = new String[5];
extended[3] = "D";
extended[4] = "E";
System.arraycopy(names, 0, extended, 0, names.length);
for (String str : extended){
System.out.println(str);
}
}
}
运行结果：
A
B
C
D
E
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