We have created a button component here, which will places in bottom-right corner −JButton button = new JButton("This is Demo Text!"); button.setBackground(Color.blue); button.setForeground(Color.white);Create panels now to arrange the above created button component in the bottom right −JPanel bottomPanel = new JPanel(new BorderLayout()); bottomPanel.add(button, BorderLayout.LINE_END); JPanel mainPanel = new JPanel(new BorderLayout()); ... Read More

To get a file’s size in C++ first open the file and seek it to the end. tell() will tell us the current position of the stream, which will be the number of bytes in the file.Example Live Demo#include #include using namespace std; int main() {    ifstream in_file("a.txt", ios::binary);   ... Read More

To reverse array field in MongoDB, you can use forEach(). Let us first create a collection with documents −> db.reverseArrayDemo.insertOne({"Skills":["C", "Java"]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5ccddf99dceb9a92e6aa1946") }Following is the query to display all documents from a collection with the help of find() method −> db.reverseArrayDemo.find().pretty();This will ... Read More

In this section, we will see how we can get the size of an integer array in C or C++? The size of int[] is basically counting the number of elements inside that array. To get this we can use the sizeof() operator. If the array name is passed inside ... Read More

To set the alignment of the label content along the X axis on the left, use the setHorizontalAlignment() method and set the location. Let us first set a label component. We have set the label background color as well so that we can check the alignment of the label’s content ... Read More

For this, use the $all operator. Let us first create a collection with documents −>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C++", "Java", "MongoDB"]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd69a5f57806ebf1256f12e") } >db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["MySQL", "Java", "MongoDB"]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd69ac057806ebf1256f12f") } >db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C#", "Python", "MongoDB"]}); {    "acknowledged" : true,    "insertedId" ... Read More

Here is an example of Read integers from a text file with C++ ifstream.Example#include #include using namespace std; int main() {    //initialie the array size    int arr[30];    ifstream is("a.txt");    int cnt= 0;    int x;    // check that array is not already full   ... Read More

Here we will see how to pass reference of some variable in C++. Sometimes we call it as “Call by Reference”.The call by reference method of passing arguments to a function copies the reference of an argument into the formal parameter. Inside the function, the reference is used to access ... Read More

To set the alignment of the label’s content along the Y axis on the top, use the setVerticalAlignment() method and set the location. Let us first set a label component. We have set the label background color as well so that we can check the alignment of the label’s content ... Read More

To access array elementsWe can access array elements by using pointers.In CExample Live Demo#include int main() {    int a[] = { 60, 70, 20, 40 };    printf("%d", *(a + 1));    return 0; }Output70In C++Example Live Demo#include using namespace std; int main() {    int a[] = { 60, 70, 20, 40 };    cout