Java 数组合并

// 自己记录一下
public static String[] concat(String[] a, String[] b) {
    String[] c = new String[a.length + b.length];
    System.arraycopy(a, 0, c, 0, a.length);
    System.arraycopy(b, 0, c, a.length, b.length);
    return c;
}