Take a look at article https://www.tutorialspoint.com/java/util/java_util_random.htm. All you need to do is to generate pairs of floats in range (-1,1). You should use method nextFloat() from class Random. It will give you numbers in range (0,1). Then multiply it by 2 and subtract 1 and you will have numbers in desired interval. 0 solved How … Read more
I guess you did set undecorated(true), that’s why you can not move the application. This method will remove the standard actions like, minimize, resize and close. Even so, it will disable the drag and drop bar on top of each Frame. Just comment out this line and it will be moveable again Hope this is … Read more
This question can be simply solved by using z-function in linear time. int NumberOfcopies(String t, String h){ // t = the first string i.e “ooo” // h = the second string i.e “wooooooooooooooooooooow” String s = t + “$” + h; // adding a sentinel character in between int n = s.length(); // length of … Read more
The object itself didn’t change. What you have done is the following name <- String(“Paul”) name <- String(“Henry”) String(“Paul”) has been not been changed. Try the following: String a = “test”; String b = a; a = “test2”; System.out.println(b); solved Java Strings are immutable? [duplicate]
Create a new Fragment that describes what you want to do in each pane. For example, import android.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class ButtonOneFragment extends Fragment { public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (container != null) { container.removeAllViews(); } return inflater.inflate(R.layout.button_one_fragment, container, false); } public void … Read more
You make an array of four elements, and then never use the ‘0’ element. Sorry, but you can’t change the language. solved How do you make an array that has 1-3 int, instead of the default 0-3 int? [closed]
You could just use simple math in Java. Example: int peopleAmount = 3; int money = peopleAmount * 5; System.out.println(money); //Would print 15 This example would calculate the money I would need if I give 3 people each 5$. You can easily adapt that example. I know it can be hard to learn a programming … Read more
Your linked list declaration is wrong. You don’t use [] when creating a new object in java. Instead you use (). And your generic type is also wrong -> if you want to have more linked lists inside the main linked list. Try this LinkedList<LinkedList> LK = new LinkedList<>(); Note – The part inside <> … Read more
Q1. can we compile this java class? Note we don’t have a main method in this class. Yes, that class should compile. There’s no requirement that says you need a main method in every class for it to compile. (Most of your classes won’t have their own main method.) Q2. Is there any way we … Read more
for ( a = line.getSize() – 1; a >= 0; a–); test(a, line); } You have a semicolon at the end of your for loop. What happens is that the for loop loops but never executes test. So a is set to -1 through the iterations then test is called. Get rid of the semicolon … Read more
This just reads and tries to parse the number, if it fails, then it just move on to the while loop’s guard. Also you should try to use Integer.MAX_VALUE instead of a random number. Just in case someone decides to actually use the max value; don’t assume that 9,999,999 or how ever many 9’s you … Read more
Regardless of good practice, the point here is you have two options to model this: Elect to manually assign the Department‘s Id on the Employee. Associate the new Employee with an existing Department entity at save. Which you pick really depends on a number of factors. Often the former is chosen when working with legacy … Read more
Currently I am looking for best replacement of HashMap becuase of memory overhead and I need faster update and retrieval of data. I don’t know if a Trie will give you a smaller memory overhead than a HashMap. It depends on the size and distribution of the keys, and on how you implement the Trie. … Read more
In keeping with the concept of type,instanceos says,”Are you this class,or a class derived from this class?”——-<> solved About inheritance of java [duplicate]
for (final Map.Entry<String, Object> entry : hashmap.entrySet()) { final String key = entry.getKey(); System.out.println(“Key:” + key); Object obj = entry.getValue(); } solved How can I retrieve values and keys from a HashMap in Java 8?