以下实例演示了如何在数组初始化后对数组进行扩容：

/*
 author by w3cschool.cc
 文件名：Main.java
 */

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);
      }
   }
}

以上代码运行输出结果为：

A
B
C
D
E