Hi all! I need help with a simple coding challenge. I am comparing two arrays but my code doesn't work the way it suppose to. Code should return 1 if the indexes a
util.ArrayList; import java.util.Arrays; import java.util.List; public class ARBRDD{ public static boolean compareList(ArrayList ls1, ArrayList ls2){ return ls1.toString().contentEquals(ls2.toString())?true:false; } public static void main(String[] args){ ArrayList<String> firstList = new ...
I think Michael is right, I have the wrong logic here, because say I have two arrays array1 = {a,b,c,c,e}; array2={d,e}; I have to check array1.a exists in array2 if not then delete the array1.a from the database. thats how it goes.. But as per the current logic, ...
示例1: // Java program to demonstrate// Comparator.comparingInt(java.util.function.ToIntFunction) methodimportjava.util.Arrays;importjava.util.Collections;importjava.util.Comparator;importjava.util.List;publicclassGFG{publicstaticvoidmain(String[] args){// create some user objectsUser u1 =newUser("...
程序2 :// Java program to demonstrate Comparator // comparingLong(ToLongFunction) method import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.List; public class GFG { public static void main(String[] args) { // before sort List<Order> list =...
import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.List;public class ComparingExample2 { public static void main(String... args) { List<Customer> list = createExampleCustomers(); System.out.printf("before sort: %s%n", list); Collections.sort(...
示例2: // Java program to demonstrate Comparator//comparingDouble(ToDoubleFunction) methodimportjava.util.Arrays;importjava.util.Collections;importjava.util.Comparator;importjava.util.List;publicclassGFG{publicstaticvoidmain(String[] args){// before sortList<Order> list = Arrays.asList(newOrder("A...
You can observe that the result of the comparison is-1because, in both the arrays, differences are coming at the second index. The object"a"is smaller than the object"b", that is why we are getting -1 as the result of the comparison. ...
So next, let’s add two“find”methods in ourWeekday enum: enum Weekday { Mon("Monday"), ... static Optional<Weekday> byNameIgnoreCase(String givenName) { return Arrays.stream(values()).filter(it -> it.name().equalsIgnoreCase(givenName)).findAny(); ...
在Arrays.asList()引发的问题中进一步学习集合与泛型等内容 前言 最近在网上看到一个问题,情况类似如下(记为问题1): 结果第一个输出为true,提问者觉得很正常,第二个输出却为false了,很奇怪。如果没有深入使用过该集合,或是理解泛型,在我的第一眼看来,也是有疑惑。按理来说,Java中本身针对基本类型与对应包装...