SortArrayListAscDes sortArrayListAscDes = new SortArrayListAscDes(stringArrayListist); System.out.println("没有经过排序的数组: "+stringArrayListist); System.out.println("升序排序: "+ sortArrayListAscDes.sortAscending()); System.out.println("降序排序: "+ sortArrayListAscDes.sortDescending()); }...
SortArrayListAscendingDescending.java 在上面的类中,我们在构造器中初始化了一个 ArrayList 对象。在 sortAscending()方法中,我们调用了 Collections.sort()方法,并传递这个初始化的 ArrayList对象为参数,返回排序后的 ArrayList。在 sortDescending()方法中,我们调用重载的 Collections.sort()方法让其按照降序对元素排序,...
packageguru.springframework.blog.sortarraylist.ascendingdescending; importorg.junit.Test; importjava.util.ArrayList; importstaticorg.junit.Assert.*; publicclassSortArrayListAscendingDescendingTest { @Test publicvoidtestSortAscendingDescending()throwsException { ArrayList countryList =newArrayList<>(); countryLis...
在 sortAscending()方法中,我们调用了 Collections.sort()方法,并传递这个初始化的 ArrayList对象为参数,返回排序后的 ArrayList。在 sortDescending()方法中,我们调用重载的 Collections.sort()方法让其按照降序对元素排序,这个版本的 Collections.sort()接收ArrayList对象作为第一个参数,一个由 Collections.reverseOrder(...
Learn to sort Java ArrayList in ascending and descending order using ArrayList.sort(), Collections.sort(), Comparator interface and Java 8 Streams.
package guru.springframework.blog.sortarraylist.ascendingdescending; import org.junit.Test; import java.util.ArrayList; import static org.junit.Assert.*; public class SortArrayListAscendingDescendingTest { @Test public void testSortAscendingDescending() throws Exception { ArrayList countryList = new ...
package guru.springframework.blog.sortarraylist.ascendingdescending; import org.junit.Test; import java.util.ArrayList; import static org.junit.Assert.*; public class SortArrayListAscendingDescendingTest { @Test public void testSortAscendingDescending() throws Exception { ...
import java.util.ArrayList; import static org.junit.Assert.*; public class SortArrayListAscendingDescendingTest { @Test public void testSortAscendingDescending() throws Exception { ArrayList countryList = new ArrayList<>(); countryList.add("France"); countryList.add("USA"); countryList...
In one of the previous examples, we covered how to sort an ArrayList in ascending order. In this post, you will learn how to sort ArrayList in descending order in Java. We will explore the following ways: Using the sort() method Using the Collections.sort() and Collections.reverse() ...
从Java 8开始,ArrayList类实现了List接口中的default方法sort(),该方法允许直接对ArrayList进行排序。 升序排序: 与Collections.sort()类似,ArrayList.sort()也可以按照元素的自然顺序进行升序排序。 java countryList.sort(null); // 传入null表示使用自然顺序 System.out.println("Sorted ArrayList in Ascending Order...