import java.util.ArrayList;import java.util.Arrays;import java.util.HashSet;import java.util.List;import java.util.Set;import org.apache.commons.lang.ArrayUtils;public class Test2 {/** * @param args * 注：ArrayUtils包引自apache：commons-lang-2.3.jar包 */public static void main(String[] args) {// TODO Auto-generated method stub //String[] stringArray = {"1","5","7","3"}; //String[] stringArray1 = {"1","5","7","3"}; int[] stringArray = {1,5,7,3}; int[] stringArray1 = {1,5,7,3}; Arrays.sort(stringArray);//对数组进行排序 System.out.println("对数组元素进行排序进行排序："); Test2.output(stringArray); System.out.println("两组数组数据是否相等："+Arrays.equals(stringArray, stringArray1));//注意：stringArray这里已经进行了排序 //从数组中创建数组列表 String[] array = { "1","5","7","3" }; List<String> arrayList = new ArrayList<String>(Arrays.asList(array)); System.out.println("myarrayList======>>>"+arrayList); System.out.println("array======>>>"+array[2]);//字符串数组中是否包含某个特定值 boolean b = Arrays.asList(array).contains("1"); System.out.println("b=======>>>"+b); //整型数组中是否包含某个特定值 int[] i={0,6,5,4,6,8,9,9,9}; Arrays.sort(i);//判断整型数组中是否包含某个特定值，需要对这个数组进行排序 System.out.println("i===========>>>"+ Arrays.binarySearch(i, 9));//如果返回值>=0,则存在,返回值<0，则不存在//for(int i=0;i<arrayList.size();i++){ for(String ub:arrayList){// System.out.println("arrayListinfo====>>>"+arrayList.get(i)); System.out.println("ub====>>>"+ub); } //连接两个数组（ Concatenate two arrays） //int[] intArray1 = { 1, 2, 3, 4, 5, 6 }; //int[] intArray2 = { 6, 7, 8, 9, 10 }; String[] intArray1 = { "1","2","3","4" }; String[] intArray2 = { "4","3","2","1" }; //int[] combinedIntArray = ArrayUtils.addAll(intArray1, intArray2); String[] combinedIntArray = (String[]) ArrayUtils.addAll(intArray1, intArray2); for(String in : combinedIntArray){ System.out.println("combinedIntArray========>>>>"+in); } //将数组转换成一个集合 Set<String> set = new HashSet<String>(Arrays.asList(array)); System.out.println("set=======>>>>"+set); //反向数组（倒序排序） int[] intArray = { 1, 2, 3, 4, 5 }; ArrayUtils.reverse(intArray); System.out.println("intArray=======>>>"+Arrays.toString(intArray)); //删除数组元素（Remove element of an array） //int[] removeArray = { 1, 2, 3, 4, 5 }; String[] removeArray={"5","4","2","9"}; //int[] removed = ArrayUtils.removeElement(removeArray, 3); String[] removed = (String[]) ArrayUtils.removeElement(removeArray, "4"); System.out.println("removed=======>>>>>"+Arrays.toString(removed)); //调用getDouble方法 String str="1,2,5,3,4"; double strr[]=getDouble(str); for(double dou : strr){ System.out.print("dou==========>>>>"+dou+" "); } }//字符串转换成double数组public static double[] getDouble(String str) {String[] sFirst = str.split(",");double[] doubl = new double[sFirst.length];for (int j = 0; j < sFirst.length; j++) {doubl[j] = Double.parseDouble(sFirst[j]);}return doubl;}//public static void output(String[] array) {public static void output(int[] array) {if (array!=null) {for (int i = 0; i < array.length; i++) {System.out.print(array[i]+" ");}}System.out.println();}}
