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Programming Articles
Page 2455 of 2547
How to initialize a const field in constructor?
Here we will see how to initialize the const type variable using constructor?To initialize the const value using constructor, we have to use the initialize list. This initializer list is used to initialize the data member of a class. The list of members, that will be initialized, will be present after the constructor after colon. members will be separated using comma.Example#include using namespace std; class MyClass { private: const int x; public: MyClass(int a) : x(a) { //constructor } void show_x() { ...
Read MoreSet the content of the label horizontally and vertically centered in Java
To simply set the content of the label horizontally and vertically centered, use the constant CENTER.JLabel label = new JLabel("Best IDE", JLabel.CENTER);The following is an example to set the content of the lable horizontally and verticaly centered −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Frame"); frame.setLayout(new FlowLayout()); JLabel label = new JLabel("Best IDE", JLabel.CENTER); label.setPreferredSize(new Dimension(190, 100)); label.setOpaque(true); ...
Read MoreLexicographically next permutation in C++
Here we will see how to generate lexicographically next permutation of a string in C++. The lexicographically next permutation is basically the greater permutation. For example, the next of “ACB” will be “BAC”. In some cases, the lexicographically next permutation is not present, like “BBB” or “DCBA” etc.In C++ we can do it by using a library function called next_permutation(). This is present in the algorithm header file.Example#include #include using namespace std; main() { string s = "DBAC"; for(int i = 0; i
Read MoreHow to arrange components in a FlowLayout to be left-justified in Java?
Use FlowLayout.LEFT to arrange components in a FlowLayout to be left-justified. The following is an example to arrange components in a FlowLayout to be left-justified −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Internet Language"); frame.setLayout(new FlowLayout(FlowLayout.LEFT)); JLabel label = new JLabel("Top Internet Language"); label.setPreferredSize(new Dimension(240, 70)); label.setOpaque(true); label.setBackground(Color.RED); label.setForeground(Color.WHITE); Font ...
Read MoreC++ Program to Find the Shortest Supersequence that Contains Two or more Sequences as Subsequences
Here we shall discuss a C++ Program to find the Shortest Supersequence that contains two or more Sequences as Subsequences.AlgorithmBegin function ShortestSubSeq() returns supersequence of A and B: 1) Declare an array ss[i][j] which contains length of shortest supersequence for A[0 .. i-1] and B[0 .. j-1]. 2) Find the length of the possible supersequence in bottom up manner using recursion. 3) Declare an array ss[i][j] which stores length of shortest supersequence for A[0 .. i-1] and B[0 .. j-1] in index. 4) Declare a string s to store the shortest subsequence. 5) Initialize ...
Read MoreHow to filter non-null value in Java?
Let’s say the following is our List with string elements:List leagues = Arrays.asList("BBL", "IPL", "MLB", "FPL", "NBA", "NFL");Now, create a stream and filter elements that end with a specific letter:Stream stream = leagues.stream().filter(leagueName -> leagueName.endsWith("L"));Now, use Objects::nonnull for non-null values:List list = stream.filter(Objects::nonNull).collect(Collectors.toList());The following is an example to filter non-null value in Java:Exampleimport java.util.Arrays; import java.util.List; import java.util.Objects; import java.util.stream.Collectors; import java.util.stream.Stream; public class Demo { public static void main(String[] args) { List leagues = Arrays.asList("BBL", "IPL", "MLB", "FPL", "NBA", "NFL"); Stream stream = leagues.stream().filter(leagueName -> leagueName.endsWith("L")); List list = ...
Read MoreC++ Program to Find the Longest Prefix Matching of a Given Sequence
Here we shall discuss a C++ program to find the Longest Subsequence Common to All Sequences in a Set of Sequences.AlgorithmsBegin Take the array of strings as input. function matchedPrefixtill(): find the matched prefix between string s1 and s2 : n1 = store length of string s1. n2 = store length of string s2. for i = 0, j = 0 to i
Read MoreHow can I position JButtons vertically one after another in Java Swing?
Position buttons vertically one after another using the Box class. Use the createVerticalBox() method that displays components from top to bottom −JButton button1 = new JButton("One"); JButton button2 = new JButton("Two"); JButton button3 = new JButton("Three"); Box box = Box.createVerticalBox(); box.add(button1); box.add(button2); box.add(button3);The following is an example to position buttons vertically one after another −Examplepackage my; import javax.swing.Box; import javax.swing.JButton; import javax.swing.JFrame; public class SwingDemo { public static void main(String[] args) { JButton button1 = new JButton("One"); JButton button2 = new JButton("Two"); JButton button3 = new JButton("Three"); ...
Read MoreC++ Program to Find number of Ways to Partition a word such that each word is a Palindrome
Here we shall discuss a C++ Program to find number of ways to Partition a word in such a way that each word is a Palindrome.AlgorithmsBegin Take the word as input. Function partitionadd(vector &u, string &s, vector &tmp, int index): if (index == 0) tmp.clear() for i = index to length-1 st = st + s[i] if (checkPalin(st)) tmp.push_back(st) if (i+1 < length) partitionadd(u, s, tmp, i+1) else ...
Read MoreHow to disable close button on a JFrame in Java?
To disable the close button, let us first create a frame −JFrame frame = new JFrame("Login!");Use the setDefaultCloseOperation() to set the status of the close button. Set it to DO_NOTHING_ON_CLOSE to disable it −frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);The following is an example to disable close button on a JFrame in Java −Examplepackage my; import java.awt.GridLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Login!"); JLabel label1, label2, label3; frame.setLayout(new GridLayout(2, 2)); label1 = ...
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