float myFloat = x; //your float double d = (double)myFloat;
Here is what the above code is Doing:
1. We create a float variable called myFloat and assign it the value of x.
2. We create a double variable called d and assign it the value of myFloat.
3. We cast myFloat to a double.
// for java // ** use ‘synchronized’ keyword in function declaration public static synchronized Database getInstance(){…} Here is what the above code is Doing: 1. The first time getInstance() is called, it creates a new Database object and returns it. 2. The second time getInstance() is called, it returns the same Database object that was…
//Invisible/Transparent Button in swing button.setOpaque(false); button.setContentAreaFilled(false); button.setBorderPainted(false); Here is what the above code is Doing: 1. setOpaque(false) – makes the button transparent 2. setContentAreaFilled(false) – the area inside the borders will not be filled with the background color. 3. setBorderPainted(false) – the borders will not be painted.
int maxNumberOfElements = 10; list.stream() .limit(maxNumberOfElements); Here is what the above code is Doing: 1. We’re creating a stream from the list. 2. We’re limiting the stream to a maximum of 10 elements. 3. We’re printing the elements of the stream.
public class Main { public static void main(String[] args) { System.out.println(“Hello, World!”); } } Here is what the above code is Doing: 1. The first line is a comment. Comments are ignored by the compiler. 2. The second line is a package declaration. The package declaration is used to organize your code. 3. The third…
// With Graphics object g.translate(200, 200); // With Graphics2d object g2.translate(200, 200); Here is what the above code is Doing: 1. We create a Graphics object and a Graphics2d object. 2. We translate the origin of the Graphics object by 200 pixels to the right and 200 pixels down. 3. We translate the origin of…
final PackageManager pm = getPackageManager(); //get a list of installed apps. List packages = pm.getInstalledApplications(PackageManager.GET_META_DATA); for (ApplicationInfo packageInfo : packages) { Log.d(TAG, “Installed package :” + packageInfo.packageName); Log.d(TAG, “Source dir : ” + packageInfo.sourceDir); Log.d(TAG, “Launch Activity :” + pm.getLaunchIntentForPackage(packageInfo.packageName)); } // the getLaunchIntentForPackage returns an intent that you can use with startActivity() Here is…