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();longresult=Long.valueOf(reverse.toString());if(num >0) {returnresult...
程序1:对于一个正数。 // Java program to illustrate the// Java.lang.Integer.reverse() methodimportjava.lang.*;publicclassgeeks{publicstaticvoidmain(String[]args){inta=168;System.out.println("Number = "+a);// It returns the value obtained by reversing order of the bitsSystem.out.println("...
Reverse Integer之Java实现 一、题目 Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are dealing with an environment which could only store integers within...
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,...
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...
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...
为什么不直接&上0x00ff00ff，然后移动8位，最后再移动16位。是因为…reverse嘛，就是把组成Integer的...
Array after the use of Collection.reverseOrder() and Arrays.sort() : [40, 30, 20, 10] Java Copy案例3: 当有一个用户定义的比较器进行反向排序时,要按照卷号的降序对学生进行排序。public static Comparator reverseOrder(Comparator c) Java Copy...
代码语言:javascript 代码运行次数: importjava.util.Scanner;publicclassMain{publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);int t=sc.nextInt();while(t-->0){String str=sc.next();int instr=Integer.parseInt(str);//System.out.println(instr);str=Integer.toString(instr);//Sys...