final is a reserved keyword in Java and cannot be used for variable names. Rename the final variable. 1 solved (Java) Program gives me an illegal type of expression and “;” expected even when I actually typed in a semi colon
You can use string replace method. see below String number = +9231235410; String newNumber = number.replace(“+92″,”0”); EDIT: this one is base on your code private String modifyNumber(String num) { if (num.startsWith(“+92”)) { num = num.replaceFirst(“\\+(92)”, “0”);} return num;} Note: In java, you need to have double backslash since the \ is a unique java character. … Read more
This should fix both your issues.. I’ve made a number of changes to the code, so it will be difficult to explain everything, but I’ve included the main points after the code. Try going through it and add a comment in case of any doubt. import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; … Read more
I did sthg like this; I write two for loop to scan both side, and a prime method to find prime numbers. public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int minPrime = 0; int maxPrime = 0; System.out.println(“Please give a number “); int number = scanner.nextInt(); for (int i = number … Read more
Your out label “annotates” this for-loop: out: for(i = 0 ; i <= 6 ; i++) { System.out.println(i); } So in order to continue with the label out, it would need to be within that for-loop. It doesn’t make sense to use it after that for-loop has ended. This will compile, for example: out: for(int … Read more
Create a class for Node, with a set of children, which are nodes as well, store the root Node(s). Implement method for insertion. Then implement the following algorithm: Find the elements, having null as parent, store them as root nodes. When a Node is created, find all its children and create them as children. (Note, … Read more
These are two tasks: get the list of primes (or just something like nextPrime(int)) and get the triangle, both are very simple. For the implementation of first, you may look at Next Prime number Java only working with certain numbers For the implementation of second, just do something like: for (int i = 1; i … Read more
I think this is everything that every Java class has: A class name. A class access … implicitly package private, if you don’t specify one. A package … implicitly the default package, if you don’t specify one. A superclass … implicitly java.lang.Object, if you don’t specify one. A body which may be empty. A constructor … Read more
Static properties belong to the Class whereas instance variables belong to the particular object instance. You should take a read through this: https://docs.oracle.com/javase/tutorial/java/javaOO/classvars.html solved Cannot understand the difference between static and non-static variables in Java. Can anyone help please? [duplicate]
Regex is your friend : public static void main(String[] args) throws Exception { String s1 = “jdK1TESTds3TEST”; System.out.println(s1.replaceAll(“(?i)(.*)TEST$”, “$1”)); } O/P : jdK1TESTds3 The code above replaces the last TEST (if it exists). Add (?i) modifier to make it case-insenstive. 4 solved Checking of String if it has this specific value [closed]
final String scanResult = result.getText(); Intent intent = new Intent(getBaseContext(), ResultPage.class); intent.putExtra(“SCAN_RESULT”, scanResult); startActivity(intent); Now you can find scanResult in ResultPage activity String s = getIntent().getStringExtra(“SCAN_RESULT”); 7 solved Passing data to another activity (Android Studio) [duplicate]
Your C version does not print “0 1 2 0 1 2 …”. It prints “0 1 2 3 0 1 2 3 …” instead. If you want a Java program that does what your C version really does: public class Program { public static void main(String[] args) { for (int i = 0; i … Read more
That’s because there’s an infinite loop just before it: for(i = 0; 9 <26;i++) bigQ.put((char) (‘A’ + i)); Since 9 < 26 will always be true, the loop will execute forever. Did you mean to do this instead?: for(i = 0; i <26;i++) bigQ.put((char) (‘A’ + i)); 1 solved Compiling Error- Unreachable Statement
public static int findSmallest(int[] arr) { int smallest = Integer.MAX_VALUE; for(int i=0; i<arr.length; i++) { if(arr[i] > 0 && arr[i]<smallest) { smallest = arr[i]; } } return smallest; } At the end, if smallest == Integer.MAX_VALUE, then all the array is filled of zeros. 4 solved Java: Finding the smallest greater than zero number in … Read more
I’m not really a Java developer but this should work better: import java.util.*; public class ExtLinkedList<E> extends LinkedList<E> { public ExtLinkedList<E> oddItemsList () { ExtLinkedList<E> oddList = new ExtLinkedList<E>(); //Get the iterator of the current list instead of the new empty list. //Otherwise you will iterate over nothing. ListIterator<E> itr = listIterator(); for(int i = … Read more