整型数n反转后的结果可能超出int类型所能表示最大范围,在Java中,int类型的包装类Integer定义了两个常量,MAX_VALUE(2147483647) 和MIN_VALUE(-2147483648),这两个常量指示了int型所能表示的数字范围,如果数字超过这个范围则不能正确的被表示,因此我们在改进代码的时候应该把溢出判定考虑进去,如果反转的过程中出现溢出,...
java JDK8中 Integer的reverse函数为什么左移24位？[图片] 如图，JDK8中，为什么最后要左移24位，也就...
利用StringBuilder的reverse方法,将数字转换成字符反转然后再转换回整数 publicintreverseInteger(intnum){if(num ==0|| (num <10&& num > -10)) {returnnum; }// 获得绝对值 去掉正负号inttemp=Math.abs(num);StringBuilderst=newStringBuilder(String.valueOf(temp));StringBuilderreverse=st.reverse();longres...
Reverse Number using Java program //Java program to Reverse a Number.importjava.util.*;publicclassReverseNumber{publicstaticvoidmain(String[]args){intnumber;Scanner sc=newScanner(System.in);//Read NumberSystem.out.print("Enter an integer number: ");number=sc.nextInt();//calculate reverse numbe...
Reverse digits of an integer. Example1:x = 123, return 321 Example2:x = -123, return -321 1publicclassSolution {2publicintreverse(intx) {3String str=x+"";4booleanisNeg=false;5if(str.charAt(0)=='-')6{7str=str.substring(1);8isNeg=true;9}1011//System.out.println(str);12char...
Java Code: // Import the Arrays class from the java.util package.importjava.util.Arrays;// Define a class named Exercise11.publicclassExercise11{// The main method where the program execution starts.publicstaticvoidmain(String[]args){// Declare and initialize an integer array 'my_array1'.in...
1. What does the Integer.reverse() method do? A. Reverses the order of digits in an integer B. Converts an integer to a binary string C. Calculates the square of an integer D. Sorts an array of integers Show Answer 2. Which data type does the Integer.reverse() method return...
java.lang.Integer.reverse()是Java中的內置方法,用於返回指定int值的二進製補碼二進製表示形式的位的相反順序。 用法: public static intreverse(int a) 參數:參數a是一個整數值,其位將被取反。 返回值:該方法返回通過反轉指定int值中的位順序獲得的值。
Java.IO Java.Lang Java.Lang AbstractMethodError AbstractStringBuilder ArithmeticException ArrayIndexOutOfBoundsException ArrayStoreException AssertionError 布尔 BootstrapMethodError Byte 字符 Character.Subset Character.UnicodeBlock Character.UnicodeScript CharSequenceConsts 类 ClassCastException ClassCircularityError ClassFo...
Java// Java program to Illustrate Reversal of Array // using reverse() method of Collections class // Importing utility classes import java.util.*; // Main class public class GFG { // Main driver method public static void main(String[] args) { // Creating input integer array Integer arr...