没有使用import之前,操作不在同一个包中的类,得使用全限定名来操作. /** 没有使用import每次调用Arrays类的方法时都要使用它的全限定名 */ class ImportDemo { public static void main(String[] args) { int[] arr = {1,5,78,34,23,5,6,2}; String arrString1 = java.util.Arrays.toString(arr)...
importjava.util.ArrayList;ArrayList<Integer>myList=newArrayList<Integer>();myList.add(1);myList.add(2);myList.add(3);System.out.println(myList.get(1));#Output:#2 Java Copy In this example, we’ve created an ArrayList namedmyListand added three elements to it. We then printed the seco...
(1)导入java.util下的包中的类——import java.util.Arrays (2)调用相应的API——Arrays.方法名() 1.1 使用工具类打印数组——toString方法 1 import java.util.Arrays; 2 public class study{ 3 public static void main(String[] args) { 4 int[] a= {2,3,4,5,9,7,8}; 5 System.out.println(...
1importjava.util.Arrays;2importjava.util.Scanner;34/*5* Arrays排序5名学员成绩6**/7publicclassArraysSortScore {8publicstaticvoidmain(String[] args) {9int[] scores=newint[5];10Scanner input=newScanner(System.in);11System.out.println("请输入5名学员的成绩:");12//获取学员成绩13for(inti=0;...
import java.*: ArraysChuck Allison
import java.util.Arrays; public class ArraysTest { public static void main(String[] args) { //1.判断两个数组是否相等 int[] arr1 = new int[]{1, 2, 3, 4}; int[] arr2 = new int[]{1, 3, 2, 4}; boolean isEquals = Arrays.equals(arr1, arr2); System.out.println(isEquals)...
import java.util.Arrays; public class ArraySorter { public static void main(String[] args) { int[] numbers = {5, 3, 8, 1, 6}; Arrays.sort(numbers); System.out.println("Sorted numbers: " + Arrays.toString(numbers)); } } ```相关...
import java.util.Arrays;import java.util.List;public class ArraysAsListExample { public static void main(String[] args) { String[] colorsArray = {"Red", "Green", "Blue"}; List<String> colors = Arrays.asList(colorsArray); // Modifying the list (and array) colors.set(0...
import java.util.List; public class ListOfExample { public static void main(String[] args) { String[] colorsArray = { "Red", "Green", "Blue" }; List<String> colors = List.of(colorsArray); colorsArray[0] = "Yellow"; // Accessing elements in the original array System.out.println(...
importjava.util.Arrays; // 导入util.Arrays类publicclass Test { public static void main(String[] unused) { String[] str = {"xxx","zzz","yyy","aaa"}; //定义字符串数组 Arrays.sort(str); //对字符串数组的内容进行排序 intindex=Arrays.binarySearch(str,"zzz"); //使用二分法查找字符...