Java數組擴展

在Java中，數組初始化後如何擴展數組？

示例

以下示例顯示如何在創建新並初始化數組後擴展數組。

package com.zaixian;

public class ExtendingArray {
    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.print(str+",");
        }
    }
}

執行上面示例代碼，得到以下結果 -

A,B,C,D,E,

示例2

以下是數組擴展的另一個示例示例 -

package com.zaixian;

public class ExtendingArray2 {
    public void extendArraySize() {
        String[] names = new String[] { "Maxsu", "Minsu", "Sum" };
        String[] extended = new String[5];
        extended[3] = "Sukida";
        extended[4] = "Avg";
        System.arraycopy(names, 0, extended, 0, names.length);

        for (String str : extended)
            System.out.println(str);
    }

    public static void main(String[] args) {
        new ExtendingArray2().extendArraySize();
    }
}

執行上面示例代碼，得到以下結果 -

Maxsu
Minsu
Sum
Sukida
Avg