通过在末尾添加一个元素来扩展数组。
/** 时 代 J a v a - N o w J a v a . c o m 提 供 **/ //package com.nowjava; public class Main { /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public short[] expandArray(short[] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public short[] expandArray(short[] src, int expandBy) { short[] dst; if (src == null) { /** * N o w J a v a . c o m 提 供 **/ dst = new short[expandBy]; } else { int n = src.length; dst = new short[n + expandBy]; for (int j = 0; j < n; ++j) { dst[j] = src[j]; } } return dst; } /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public short[][] expandArray(short[][] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public short[][] expandArray(short[][] src, int expandBy) { short[][] dst; if (src == null) { dst = new short[expandBy][]; } else { int n = src.length; dst = new short[n + expandBy][]; for (int j = 0; j < n; ++j) { dst[j] = src[j]; } } return dst; } /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public int[] expandArray(int[] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public int[] expandArray(int[] src, int expandBy) { int[] dst; if (src == null) { dst = new int[expandBy]; } else { int n = src.length; dst = new int[n + expandBy]; for (int j = 0; j < n; ++j) { dst[j] = src[j]; } } return dst; } /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public long[] expandArray(long[] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public long[] expandArray(long[] src, int expandBy) { long[] dst; if (src == null) { dst = new long[expandBy]; } else { int n = src.length; dst = new long[n + expandBy]; for (int j = 0; j < n; ++j) { dst[j] = src[j]; } } return dst; } /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public float[] expandArray(float[] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public float[] expandArray(float[] src, int expandBy) { float[] dst; if (src == null) { dst = new float[expandBy]; } else { int n = src.length; dst = new float[n + expandBy]; for (int j = 0; j < n; ++j) { dst[j] = src[j]; } } return dst; } /** * <p>Expand an array by adding one element to the end.</p> * * @param src an array * @return an array that is one element longer */ static public double[] expandArray(double[] src) { return expandArray(src, 1); } /** * <p>Expand an array by adding elements to the end.</p> * * @param src an array * @param expandBy the number of elements to add * @return an array that is longer */ static public double[] expandArray(double[] src, int expandBy) { double[] dst; if (src == null) { dst = new double[expandBy]; } else { int n = src.length; dst = new double[n + e