Java 数组的 12 个最佳方法

    String[] aArray = new String[5];  
    String[] bArray = {"a","b","c", "d", "e"};  
    String[] cArray = new String[]{"a","b","c","d","e"};  

    int[] intArray = { 1, 2, 3, 4, 5 };  
    String intArrayString = Arrays.toString(intArray);  
       
    // print directly will print reference value  
    System.out.println(intArray);  
    // [I@7150bd4d  
       
    System.out.println(intArrayString);  
    // [1, 2, 3, 4, 5]  

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]

    String[] stringArray = { "a", "b", "c", "d", "e" };  
    boolean b = Arrays.asList(stringArray).contains("a");  
    System.out.println(b);  
    // true  

    int[] intArray = { 1, 2, 3, 4, 5 };  
    int[] intArray2 = { 6, 7, 8, 9, 10 };  
    // Apache Commons Lang library  
    int[] combinedIntArray = ArrayUtils.addAll(intArray, intArray2);  

    method(new String[]{"a", "b", "c", "d", "e"});  

    // containing the provided list of elements  
    // Apache common lang  
    String j = StringUtils.join(new String[] { "a", "b", "c" }, ", ");  
    System.out.println(j);  
    // a, b, c  

    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);  

    Set<String> set = new HashSet<String>(Arrays.asList(stringArray));  
    System.out.println(set);  
    //[d, e, b, c, a]  

    int[] intArray = { 1, 2, 3, 4, 5 };  
    ArrayUtils.reverse(intArray);  
    System.out.println(Arrays.toString(intArray));  
    //[5, 4, 3, 2, 1]  

int[] intArray = { 1, 2, 3, 4, 5 };
int[] removed = ArrayUtils.removeElement(intArray, 3);//create a new array
System.out.println(Arrays.toString(removed));

    byte[] bytes = ByteBuffer.allocate(4).putInt(8).array();  
       
    for (byte t : bytes) {  
       System.out.format("0x%x ", t);  
    }