To execute a JAR file with java -jar, it needs: A class containing a public static void main(String[]) method. A META-INF/MANIFEST.MF file that names that class in its Main-class: attribute. It doesn’t appear that you’ve satisfied either criterion. Package folders have nothing to do with it. solved Creating a .jar file which includes package folder … Read more
package mavens.dais.test; public class ClassesTest { private int Numbers; public ClassesTest() {} ClassesTest(String namez) { Numbers = Integer.parseInt(namez); } public int getNumbers() { return Numbers; } public void setNumbers(int numberz) { if(numberz > 10){ System.out.print(“It is worked.”); }else{ System.out.print(“It is not worked.”); } } } package mavens.dais.test; import java.util.Scanner; public class OneTwoThre { public static … Read more
I recommend to use Regex for text pattern matching. You receive the text via console as argument, you do so by using the args array of the main-method. Here’s a small example: public final class Parser { public static void main(final String[] args) { if (args.length < 1) { // Error, no input given } … Read more
C++ destruction is deterministic, garbage collection is not. In C++ you can guarantee when destructors will be called, in Java there is no such guarantee at all. In fact, your destructors might never be called in Java. 3 solved What is the difference between Java Garbage collection and C++ object destruction? [closed]
You can try reader.ReadLine() to read the full line of user input and do what you want later in the code. For example put all chars into an array. Scanner reader = new Scanner(System.in); String input = reader.ReadLine(); char[] c = input.toCharArray(); 1 solved i would want to know how to take char input with … Read more
Here’s the logic: if(input == randNum){ ReLaunchGame(); } Now, for method ReLaunchGame() you must either restart the activity, or reset all the textfields. Just compare their input with the random number you picked. Now, to see if they entered a wrong input. You must first understand exception handling, which I think you do. (http://www.mathcs.emory.edu/) Scanner … Read more
Although this does not solve your issue directly, you can gather and count all sequences by assigning them as keys in a Map. After you do this, you can get the longest sequences and see which one has the highest frequency. Output from Code Below Sequence Frequency ——– ——— 2 2 5 3 1,2 2 … Read more
You should update the application APK from Google play itself. But if you have files other than apk, you could update it from your server throu your appliction code. You can intimate/notify your users about the availability and priority of the updates throu the application by cross-checking the latest version code from your server. Like … Read more
public class Main { int x=25; int y =25; //Go to next class second aMethod(){ Second s = new Second(); s.manipulateValues(x,y); } } public class Second { //inherit values of x and y //manipulate values //Go to next class third public void manipulateValues(int x, int y){ //manipulate here Third t = new Third (); s.manipulateHereToo(x,y); … Read more
When you create an instance of a subclass JVM creates instances of all superclasses (including Object). If you don’t call constructor of parent class yourself JVM will do it for you if parent class has noarg constructor or you will have a compilation error if your parent class doesn’t have noarg constructor and you don’t … Read more
Declare the linkedlist first, then add to it in the constructor. public static LinkedList list = new LinkedList(); public LibraryUser() { count ++; // add to the list list.add(this); } 2 solved i want to add an object to the linked list
Do like this: public int formulaMethod(int n) { int result = 1; for (int i = 1; i <= n; i++) { result *= i; } return result; } Hope it helps 0 solved Java Math Formula Loops
Here’s a Comparator inner class from my little project DBvolution: private static class ClassNameComparator implements Comparator<Class<?>>, Serializable { private static final long serialVersionUID = 1L; ClassNameComparator() { } @Override public int compare(Class<?> first, Class<?> second) { String firstCanonicalName = first.getCanonicalName(); String secondCanonicalName = second.getCanonicalName(); if (firstCanonicalName != null && secondCanonicalName != null) { return firstCanonicalName.compareTo(secondCanonicalName); … Read more
This has to do with the scope of your variables. You can find more informatnion here. Currently the variables stored in class A have package-private scope. There are really two ways to do what you are describing. The better solution would be to provide a getter method within classA: public String getA(){ return this.A; } … Read more
Use this simple utility. Easiest way to write ints to file public class WriteInts { private String fname; public WriteInts(String fname) { this.fname = fname; } public void write(int… a) throws IOException { File file = new File(fname); try { System.out.println(“WRiting to-” + file.getAbsolutePath()); if (!file.exists()) file.createNewFile(); file.canRead(); } catch (IOException x) { x.printStackTrace(); } … Read more