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Object Oriented Programming Articles
Page 368 of 589
Java Program to Save a String to a File
String, the series of characters, used in Java programming enable to save memory consumption and boost the performance. We can save a string to a file using Java program can be initiated in multiple ways and has been introduced in Java version 11. Four parameters can be used to save a string to a file using Java. They are the file path, character sequence, charset, and options. File path and character sequence, these two are the most important and mandatory for this approach to write into a file. This technique encodes the characters as the content, and it returns the ...
Read MoreJava program to reverse an array in groups of given size
An array can be reversed in groups of a given size by reversing the subarrays of the required size. In the given article, the program demonstrates a technique for reversing an array in groups of a specified size. This technique is useful in various computational tasks and algorithm design. The program takes an array and a group size as input and reverses the array in groups of that size. The original and modified arrays are then printed to the console. Problem Statement Write a Java program to reverse an array in groups of a given size. An example of ...
Read MoreJava program to find length of the longest substring without repeating characters
In Java, substrings are part of the string which contains the continuous character of the string of any length from 1 to complete string. We are given a string and we have to find the length of the largest substring from the given string that only contains the unique characters. We will see three types of methods: finding every substring, sliding windows, and two-pointers. Problem Statement Given a string, write a Java program to find length of the longest substring without repeating characters − Input thisisthegivenstring Output The length of the longest substring that contains only unique characters is: ...
Read MoreJava Program to illustrate Total Marks and Percentage Calculation
We will demonstrate how total marks and percentages are calculated using Java programs. The term total marks refer to the summation of all the available marks, while the term percentage refers to the number obtained by dividing the calculated marks by total marks and multiplying the resultant by 100. percentage_of_marks = (obtained_marks/total_marks) × 100 Problem Statement Given a Java program to calculate the total marks and percentage of a student in a given set of subject. Input marks = { 69, 88, 77, 89, 98, 100, 57, 78 } Output Total Marks is: 656 Total Percentage is: ...
Read MoreJava Program to Find Area of circle Using Method Overloading
We can calculate the area of the circle in Java using Method Overloading. “Method Overloading” is a feature in Java that allows one to write more than one method in the same class using the same method name. It will enable us to declare more than one method with the same names but with different signatures i.e., the number of parameters in the method may be different or the datatype of parameters may be different. Now, let us achieve Method Overloading in Java by considering the “area of a circle” as an example. Before moving to an example, now ...
Read MoreJava program to delete duplicate lines in text file
The interface set does not allow duplicate elements. The add() method of this interface accepts elements and adds to the Set object, if the addition is successful it returns true, if you try to add an existing element using this method, the addition operations fails returning false. Problem Statement Given a file which contains duplicate lines, write a program in Java to read the file, remove duplicate lines, and write the unique lines to a new file. Input Hello how are you Hello how are you welcome to Tutorialspoint Output Hello how are you welcome to Tutorialspoint ...
Read MoreJava program to check if a string is a valid number
In Java, verifying whether a string is a valid number is a common requirement in various applications. This process ensures that the string can be safely converted to a numerical type without causing runtime exceptions. To validate if a string can be converted to these types, we use the Integer.parseInt() and Float.parseFloat() methods, respectively. Problem Statement Given a string that may contain an integer or a float value, write a Java program to check whether it is valid number or not. Input "100" //string value Output 100 // ...
Read MoreJava Connection setTransactionIsolation() method with example
In a database system, where more than one transaction is being executed simultaneously and in parallel, the property of isolation states that all the transactions will be carried out and executed as if it is the only transaction in the system. No transaction will affect the existence of any other transaction. Transaction Isolation Levels in Java Connection JDBC (Java Database Connectivity) provides support 5 transaction isolation levels through Connection interface. TRANSACTION_NONE: It is represented by integer value 0 does not support transactions. TRANSACTION_READ_COMMITTED: It is represented by integer value 2 supports ...
Read MoreJava Program for Binary Insertion Sort
Binary insertion sort uses the binary search to find the right position to insert an element at a specific index at every iteration. First, the location where the element needs to be inserted is found. Then, the elements are shifted to the next right location. Now, the specific element is placed in the position. Problem Statement Given an integer of array implement binary insertion sort using Java to sort it. The algorithm should use binary search to determine the correct position for each element and to maintain the sorted order it will shift elements accordingly. Steps for Binary Insertion ...
Read MoreJava program to double the size of an array
In this article, we will learn how to double the size of an array in Java. This involves creating a new array with twice the length of the original array and copying the elements from the original array to the new, larger array. Problem Statement Create an initial array with predefined integer values and determine its length. Then, create a new array with double the length of the original array, copy the elements from the original array to the new one, and print the lengths of both the original and the new arrays to verify the resizing operation. Steps to ...
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