当然,你要是把int范围内的5个Perfect Number(第5个是33550336)都找出来了,直接做判断也行。 publicbooleancheckPerfectNumber3(intnum){int[] primes = {2,3,5,7,13};for(intp: primes) {if((1<< (p -1)) * ((1<< p) -1) == num) {returntrue; } }returnfalse; } 05 小结 算法专题目前...
Output the Result:Based on the above check, we print whether the number is a perfect square or not. Java Code to Check Whether a Number is a Perfect Square import java.util.Scanner; public class PerfectSquare { // Method to check whether the number is a perfect square public static boole...
AC Java: 1publicclassSolution {2publicbooleancheckPerfectNumber(intnum) {3if(num == 1){4returnfalse;5}67intsum = 1;8for(inti = 2; i<Math.sqrt(num); i++){9if(num%i == 0){10sum += i+num/i;11}12}13returnsum ==num;14}15}...
Learn how to check if a given number is a perfect number in Java with this simple guide and example code.
With less to worry about, application developers can concentrate on program logic and correctness rather than memory management, which should create less "buggy" code. This benefit is sometimes understated; it is very important. I am quite sure that there are other advantages that I can't even...
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You can use macros to check the consistency of the documentation and the code. You can mark some part of the code as a snippet, and the documentation related to the specific region may contain the hash code of the piece. When the part changes in the source code, the macro evaluation wil...
Figure 1illustrates the Java SE 8 code. First, we obtain a stream from the list of transactions (the data) using thestream()method available onList. Next, several operations (filter,sorted,map,collect) are chained together to form a pipeline, which can be seen as forming a query on the...
Easy to develop Swing GUI for desktop applications. It gives hints on code optimization while debugging and inserts the right code by itself. Cons: Takes more time to load when compared to other IDEs. Memory allocation is more than the other IDEs. ...
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