For approach 1, all you need to do is remove the call to sc.nextLine() and everything will be fine. That’s because each line contains a “token” i.e. a word, delimited by whitespace. That’s what sc.next() will return. No need to call nextLine() after that. For your approach 2, you should carefully read the API documentation … Read more
String s = “ababa”, key=”aba”; int limit= s.length()-key.length(), count = 0; for(int i=0; i<=limit; i++) { int index = s.indexOf(key, i); if(index!=-1) { i=index+1; count++; } else { break; } } System.out.println(count); solved How to find occurences of substring in a string [closed]
The instructions in the blog post are incorrect, in at least one area. The following paragraph from Step #3: The project will not currently build. We need to add the core.jar file (that we produced in the previous step) into our project. Right-click on ZXing project –> properties –> Java Build Path –> Add External … Read more
If you want the size() method to resize your window you need a least to declare one. I suggest you replace void setup(){ size(500,500); } with void setup(){ JFrame myFrame = new JFrame(); myFrame.setSize(500,500); myFrame.setVisible(true); } 2 solved size() command not working when containing method is run within a static method [closed]
java.lang.NullPointerException at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394) ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this, android.R.layout.simple_list_item_1, values); values has at least one null object in it, which you cannot have. You can read through the source code and see this happens here: T item = getItem(position); if (item instanceof CharSequence) { text.setText((CharSequence)item); } else { text.setText(item.toString()); // Line 394, when item is … Read more
You probably didn’t create the correct manifest file to add to your JAR. You need to specify what the main class is and what the classpath will be. 6 solved error creating jar file [closed]
You can use Scanner class, which provides a Scanner#nextInt() method to read the next token as int. Now, since your integers are comma(,) separated, you need to set comma(,) as delimiter in your Scanner, which uses whitespace character as default delimiter. You need to use Scanner#useDelimiter(String) method for that. You can use the following code: … Read more
The problem is the line: if(j1 + 1 < arr.length) {…} You are not iterating over the whole array; the last element is left uncounted. Without explaining to much, this could be a quick fix: public static void main(String[] args) { String[] arr = { “hello”, “how”, “hello”, “to”, “how”, “me”, “in” }; Arrays.sort(arr); int … Read more
I’m thinking something like this: Create a prepared statement and do a query with it., getting back a result set. Close the prepared statement. Attempt to close the result set after closing the prepared statement. 0 solved Simulate Result set closing failed [closed]
Java program that returns a date when given a number and returns what day it will be in the future when given another number solved Java program that returns a date when given a number and returns what day it will be in the future when given another number
Yes. The other way is, click on the dropdown menu and select the option from the dropdown using click method as below: WebElement ele = driver.findElement(By.xpath(“<Xpath of dropdown element>”)); // To find the dropdown web element List<WebElement> options = driver.findElements(By.xpath(“<Xpath of dropdown Options”)); // To find the dropdown options ele.click(); // To click on the … Read more
Your reverseArray() method assigns array to the variable revArray, thus the 2 variables pointing the same array in memory. To avoid that, try something like this: public static int[] reverseArray(int[] array){ int[] revArray= Arrays.copyOf(array, array.length); int i=0; int j=revArray.length-1; while(i<=j){ swap(i,j,revArray); j–; i++; } return revArray; } 1 solved Reverse the order of array in … Read more
You have to add dependencies for JSON support in the POM.xml such as jackson json jar [OR] add the jackson json jar to project build path and WEB-INF/lib folder. solved Restful Web services with java_web_app and json
loginUser.ifPresent(user -> { user.setLastLogin(new Date()); userService.saveUser(user); }); More elegant. Here’s more to the topic: isPresent() is bad for you. 1 solved Java 8 Optional get() method [closed]
should try it yourself, but here you go static int [] arr = new int [getcount ()]; public static void main(String[] args) { System.out.println(arr.length); } private static int getcount() { return 7; } output 7 solved Can you have a method call inside of an array declaration?