public class AddArrayToListExample { public static void main(String[] args) { int[] array = {1, 2, 3, 4, 5}; List<Integer> list = new ArrayList<>(); for (int i = 0; i < array.length; i++) { list.add(array[i]); } // 验证结果 for (int i = 0; i < list.size()...
Collections类是Java中用于操作集合的工具类,其中的addAll方法可以将一个数组中的元素添加到List中。 以下是使用addAll方法将数组添加到List的示例代码: importjava.util.ArrayList;importjava.util.Collections;importjava.util.List;publicclassArrayToListExample{publicstaticvoidmain(String[]args){String[]array={"app...
public class ArrayToListExample { public static void main(String[] args) { int[] array = {1, 2, 3, 4, 5}; List<Integer> list = new ArrayList<>(array.length); for (int i : array) { list.add(i); } System.out.println(list); // 输出:[1, 2, 3, 4, 5] } } 方式三:使...
import java.util.ArrayList; public class ArrayListSimpleExample { public static void main(String[] args) { // 创建一个 ArrayList 实例,用于存储 String 类型的元素 ArrayList<String> fruits = new ArrayList<>(); // 向 ArrayList 中添加元素 fruits.add("Apple"); fruits.add("Banana"); fruits.add...
1:importjava.util.ArrayList; 2:publicclassAddMethodExample { 3:publicstaticvoidmain(String[] args) { 4:// ArrayList of String type 5:ArrayList<String> al =newArrayList<String>(); 6:// simple add() methods for adding elements at the end ...
publicclassListSortExample2{publicstaticvoidmain(String[]args){// 创建并初始化 ListList<Person>list=newArrayList<Person>(){{add(newPerson(1,30,"北京"));add(newPerson(2,20,"西安"));add(newPerson(3,40,"上海"));}};// 使用 Comparator 比较器排序Collections.sort(list,newPersonComparator())...
publicbooleanadd(Ee){ensureCapacityInternal(size+1);// Increments modCount!!elementData[size++]=e;returntrue;} 该方法用于向ArrayList中添加元素。首先,它会调用ensureCapacityInternal方法,该方法用于确保ArrayList内部数组的容量足够,如果不够则进行扩容。然后,它会将元素添加到数组的尾部,并返回true表示插入...
The ArrayList.add() in Java adds a single element to the list, either at the end of the list or at the specified index position. Always use generics for compile-time type safety while adding the element to the arraylist. 1. ArrayList.add() Method The add() method first ensures that ...
Add new elements to an ArrayList using theadd()method. 使用add()方法将新元素添加到ArrayList packagecom.callicoder.arraylist;importjava.util.ArrayList;importjava.util.List;publicclassCreateArrayListExample{publicstaticvoidmain(String[] args){// Creating an ArrayList of String// 创建字符串的ArrayListList...
Example 1: Inserting Elements using ArrayList addAll() importjava.util.ArrayList;classMain{publicstaticvoidmain(String[] args){// create an arraylistArrayList<Integer> primeNumbers =newArrayList<>();// add elements to arraylistprimeNumbers.add(3); ...