Java数组简单使用_综合

public static void main(String[] args) {
//1定义一个数组(三种方式)
String[] Arrays1 = {"1","2","d"};
String[] Arrays2 = new String []{"w","x","w","x"};
String string = Arrays1.toString();
//2打印数组中的元素
System.out.println(Arrays1[2]);
System.out.println(Arrays.toString(Arrays1));
// 3、从Array中创建ArrayList
String[] stringArray = { "a", "b", "c", "d", "e" };
List <String> list = new ArrayList<String>(Arrays.asList(Arrays1));
System.out.println("list"+list);
ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray));
System.out.println("(Arrays.asList(stringArray)"+Arrays.asList(stringArray));
System.out.println("arrayList"+arrayList);
// 4、检查数组中是否包含某一个值
String[] stringArray4 = { "a", "b", "c", "d", "e" };
boolean contains = Arrays.asList(stringArray4).contains("a");
System.out.println("contains:"+contains);
// 5、连接两个数组
int [] arr1 ={1,2,3};
int [] arr2 = {4,5,6};
int [] arr3 = {7,8,9};
int[] addAll = ArrayUtils.addAll(arr1, arr2);
System.out.println("addAll"+Arrays.toString(addAll));
int[] addAll2 = ArrayUtils.addAll(arr3, addAll);
System.out.println("addAll2"+Arrays.toString(addAll2));
// 6声明一个数组内链
// 7、将数组中的元素以字符串的形式输出
String j = StringUtils.join(new String[] { "a", "b", "c" }, ", ");
String i = StringUtils.join(Arrays1,",");
System.out.println(j+"j");
System.out.println("i"+i);
// 8、将Array转化成Set集合
Set<String> set = new HashSet<String>(Arrays.asList(stringArray));
System.out.println("set"+set);
// 9、数组翻转
int[] intArray = { 1, 2, 3, 4, 5 };
ArrayUtils.reverse(intArray);
System.out.println("intArray"+Arrays.toString(intArray));
// 10、从数组中移除一个元素
int[] intArray1 = { 1, 2, 3, 4, 5 };
int[] removed = ArrayUtils.removeElement(intArray1, 3);//create a new array
System.out.println("intArray1"+Arrays.toString(removed));
// 再补充一个：将一个int值转化成byte数组
byte[] bytes = ByteBuffer.allocate(4).putInt(8).array();
for (byte t : bytes) {
System.out.format("0x%x ", t).toString();
}
}