数组扩容

import java.util.*;

public class array_expand {
    public static void main(String[] args) {
        String names[]=new String[]{"A","B","C"};
        String extend[]=new String[5];
        extend[3]="D";
        extend[4]="E";
        System.arraycopy(names,0,extend,0,names.length);
        for(String str:extend){
            System.out.println(str);
        }
    }
}

 

输出结果为：

A
B
C
D
E