public class fibIterative { public int AfibIterative (int num) { int i = 1; int j = 0; for (int k = 1; k < num; k++) { j = i + j; i = j – 1; } return j; } } solved I need help on converting algorithm to java
As Benjamin M correctly stated in a comment, 01 would be a string (not an int). The correct way to convert a date to a string goes through a formatter. This one gives you a two-digit month — so 01 for January through 12 for December: private static final DateTimeFormatter monthFormatter = DateTimeFormatter.ofPattern(“MM”); To use … Read more
You need to add Snackbar dependency to your app gradle file. implementation ‘com.android.support:design:27.1.1’ Then click Sync Now 6 solved Cannot resolve symbol in android studio from import
Almost correct: System.out.println((int)Math.signum(input.nextInt() – input.nextInt()); “Almost” due to possible integer overlow. Also your longer code might actually be faster (signum() operaton on floating-point numbers), not to mention more readable. 1 solved The shortest java code [closed]
Make all of your fields static if you are just calling them from the Main class. You can’t call an instance field from a static position, as you aren’t currently in an instance. If you wish to keep them non-static, you have to make an instance of DjPageDownloader by putting it in a constructor, and … Read more
If you want to use 0 and 1, here you go: Scanner scanner = new Scanner(System.in); boolean p = scanner.nextInt() != 0; boolean q = scanner.nextInt() != 0; boolean r1 = p && q; boolean r2 = q == r1; boolean r3 = p == r2; System.out.println(r3 ? 1 : 0); solved How to get … Read more
First of all, the code you posted is not valid Java. It is important that you post working code, otherwise we can’t be sure about what you are asking. Does the statement super(1,2,3) in the class B create a private fields same as the private fields in the class A? Or is it illegal to … Read more
public static void main(String[] args) { String str = “154.232”; str = str.replaceAll(“\\..*”, “”); System.out.println(str); } or str.substring(0, str.indexOf(“.”)); or // check for index of . is not -1, then do following. str.split(“.”)[0]; output 154 solved Split the number on a decimal
First you need to define what numbers is, you have only declared it. int[] numbers = new int[11]; Then insert the values you want. for ( int i = 0; i <=10; i++) { numbers[i] = i; } solved Populate int array with for loop in Java [closed]
You must pass the value belongsId: db.delete(TABLE_NAME, “BELONGS = ‘” + belongsId + “‘”, null); 5 solved how I can delete multiple rows with same id like in android sqlite
Use a List (e.g. ArrayList) instead. And before passing it to the Graph API convert it back to Numbers[] array with toArray(). There’s also an example how to loop over the list in the toArray link. solved Add and retrieve elements with Numbers array in Java
The official source for the Java standard library is the standard Java API documentation. And one notable source for design patterns is the book Design Patterns: Elements of Reusable Object-Oriented Software. To begin with, when you look at the options, the question (as quoted in your post) is badly formulated: “Which of the following classes … Read more
You must use Collections.sort() method and pass the list as argument. The list will be ordered according to the natural ordering of its element. You can have more info here: http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html solved Sort the arraylist with date, which is in string format [duplicate]
Before you do sss+=str;,please add sss=str;. you forget to update your sss. public static void main(String[] args) { String s = “2a[2b[c]]]”; Stack s1 = new Stack(); for(int i=0;i<s.length();i++) { s1.push(s.charAt(i)); } String str=””; String sss=””; for(int j=0;j<s.length();j++) { char a = (char)s1.pop(); System.out.println(“a:”+a); // if(a == ”) if((int)a >=49 && (int)a<=58){ for(int i=0;i<(int)a-48;i++){ sss=str; … Read more
I think you need to add Pattern. import java.util.*; public class lab2q2 { public static void main(String[] args) { String RegularExp = “((Mr|Ms))?[A-Z][a-z]+([A-Z]([a-z]+\\.))?([A-Z](a-z)+)”; Pattern pattern = Pattern.compile(RegularExp); Scanner keyboard = new Scanner(System.in); for(int i = 0; i< 11; i++) { System.out.println(“Please enter a name: “); String inputString = keyboard.nextLine(); Matcher matcher = pattern.matcher(inputString ); if(!matcher.matches()) … Read more