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Object Oriented Programming Articles
Page 205 of 589
How to open a plain text file in Java?
You can access a plain text using the File class.Exampleimport java.io.File; public class ReadFile { public static void main(String[] args) { File f = null; String str = "data.txt"; try { f = new File(str); boolean bool = f.canExecute(); String a = f.getAbsolutePath(); System.out.print(a); System.out.println(" is executable: "+ bool); } catch (Exception e) { e.printStackTrace(); } } }Output C:\Users\data is executable: true
Read MoreHow to find the vowels in a given string using Java?
You can read a character in a String using the charAt() method. To find the vowels in a given String you need to compare every character in it with the vowel letters. Example public class FindingVowels { public static void main(String args[]) { String str = new String("Hi Welcome to Tutorialspoint"); for(int i=0; i
Read MoreCount occurrences of a substring recursively in Java
Given two strings str_1 and str_2. The goal is to count the number of occurrences of substring str2 in string str1 using a recursive process.A recursive function is the one which has its own call inside it’s definition.If str1 is “I know that you know that i know” str2=”know”Count of occurences is − 3Let us understand with examples.For ExampleInputstr1 = "TPisTPareTPamTP", str2 = "TP";OutputCount of occurrences of a substring recursively are: 4ExplanationThe substring TP occurs 4 times in str1.Inputstr1 = "HiHOwAReyouHiHi" str2 = "Hi"OutputCount of occurrences of a substring recursively are: 3ExplanationThe substring Hi occurs 3 times in str1.Approach used ...
Read MoreChange input type value attribute in jQuery
Let’s say the following is our input type with value, “John Smith” −To change, use the attr() method −$('#changeTheName').attr('value', 'Please enter your name.......');You need to use the concept of attr(). Following is the code −Example Document $('#changeTheName').attr('value', 'Please enter your name.......'); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
Read MoreHow to hide table rows containing zero value with jQuery?
Let’s say the following is our table with product quantity records − qty: qty: qty: qty: Let us now hide using the hide() method. Following is the code −Example Document qty: qty: qty: qty: $('.hideRowContainingZeroValue input').filter(function(){ return +this.value === 0; }).closest("tr").hide() To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
Read MoreFetch value from Alert pop up in jQuery
To fetch value from alert pop up, use alert(). At first, use prompt() to input the value from user. Following is the code −Example Document var value = prompt("Please enter an integer value"); var multiplyBy10=10*value; alert("Result after multiplying by 10 = "+ multiplyBy10); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor −OutputThis will produce the following output −Put an integer value and click the OK button.After clicking the OK button, the snapshot is as follows −
Read MoreList View Search list on typing with filter like keyword search using jQuery?
Let’s the following is our input type, wherein the user will search −Now, use hide() and show() to display only relevant search and hide rest. For example, on typing “Ja”, related keywords like “Java” and “JavaScript” should be visible because it begins with “Ja”.Example Document Enter the keyword.. JavaScript John Smith Java David Miller -1) { $(this).show(); $(this).prev('.subjectName').last().show(); } else { $(this).hide(); ...
Read MoreHow to find the frequency of repeated and unique values in a vector in R?
If we unique values in a vector in R and they are repeated then we can find the frequency of those unique values, this will help us to understand the distribution of the values in the vector. On the basis of that distribution analysis, we can proceed with the further analysis that could be used. This can be done with the help of rle function.Examplex1
Read MoreStore and retrieve arrays into and from HTML5 data attributes with jQuery?
To store and retrieve arrays into and from data attributes, use the data() method in jQuery. Following is the syntax −var anyVariableName= $('#yourIdName).data('yourJavscriptArrayName');Following is the jQuery code −Example Document var value = $('#test').data('details'); alert(value); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
Read MoreHow to get value from the first checkbox which is not hidden in jQuery?
To get value from the first checkbox, which is not hidden, use the :visible selector. Following is the code −Example >Document .notShown { display: none; } var v=$('input:checkbox:checked:visible:first').val(); console.log(v); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.This will produce the following output displaying the visible value “second” in console −
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