0. 声明一个数组（Declare an array）
String[] aArray = new String[5];String[] bArray = {"a","b","c", "d", "e"};String[] cArray = new String[]{"a","b","c","d","e"};
1. 在Java中输出一个数组（Print an array in Java） int[] intArray = { 1, 2, 3, 4, 5 };String intArrayString = Arrays.toString(intArray); // print directly will print reference valueSystem.out.println(intArray);// [I@7150bd4d System.out.println(intArrayString);// [1, 2, 3, 4, 5]
2. 从数组中创建数组列表（Create an ArrayList from an array） String[] stringArray = { "a", "b", "c", "d", "e" };ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray));System.out.println(arrayList);// [a, b, c, d, e]
3. 检查数组中是否包含特定值（Check if an array contains a certain value）
String[] stringArray = { "a", "b", "c", "d", "e" };boolean b = Arrays.asList(stringArray).contains("a");System.out.println(b);// true
4. 连接两个数组（ Concatenate two arrays）
int[] intArray = { 1, 2, 3, 4, 5 };int[] intArray2 = { 6, 7, 8, 9, 10 };// Apache Commons Lang libraryint[] combinedIntArray = ArrayUtils.addAll(intArray, intArray2);
5. 声明一个数组内链（Declare an array inline ）
method(new String[]{"a", "b", "c", "d", "e"});
6. 将数组元素加入到一个独立的字符串中（Joins the elements of the provided array into a single String）
// containing the provided list of elements// Apache common langString j = StringUtils.join(new String[] { "a", "b", "c" }, ", ");System.out.println(j);// a, b, c
7. 将数组列表转换成一个数组 （Covnert an ArrayList to an array）
String[] stringArray = { "a", "b", "c", "d", "e" };ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray));String[] stringArr = new String[arrayList.size()];arrayList.toArray(stringArr);for (String s : stringArr) System.out.println(s);
8. 将数组转换成一个集合（Convert an array to a set）
Set<String> set = new HashSet<String>(Arrays.asList(stringArray));System.out.println(set);//[d, e, b, c, a]
9. 反向数组（Reverse an array） int[] intArray = { 1, 2, 3, 4, 5 };ArrayUtils.reverse(intArray);System.out.println(Arrays.toString(intArray));//[5, 4, 3, 2, 1]
10. 删除数组元素（Remove element of an array）
int[] intArray = { 1, 2, 3, 4, 5 };int[] removed = ArrayUtils.removeElement(intArray, 3);//create a new arraySystem.out.println(Arrays.toString(removed));
One more – convert int to byte array
byte[] bytes = ByteBuffer.allocate(4).putInt(8).array(); for (byte t : bytes) { System.out.format("0x%x ", t);} (转载请注明出处:http://blog.csdn.net/powmxypow/article/details/12123185 毛兴宇)