Nowshad Hasan nowshad-hasan

## SealedClass.java
// Which classes are permitted to extend this Liquid class, must be sealed/non-sealed/final.
public sealed class Liquid permits Water, Honey, Milk {}

// Now, Water can be extended by any class
public non-sealed class Water extends Liquid {}

// Honey is final. So, it can't be extended by anyone.
public final class Honey extends Liquid {}

// Milk is sealed. So, it starts another sealed hierarchy.

## PatternMatchingExample.java
static void printBookOld(Book book) {
        if (book instanceof Thriller) {
            Thriller thriller = (Thriller) book; // must-do explicit casting
            System.out.println(thriller.getSuspense());
        } else if (book instanceof AutoBiography) {
            AutoBiography biography = (AutoBiography) book; // must-do explicit casting
            System.out.println(biography.getContribution());
        }
    }

## NewStudent.java
public record NewStudent(String name, int age) {}

## OldStudent.java
public class OldStudent{

    private String name;
    private int age;

    public OldStudent(String name, int age) {
        this.name = name;
        this.age = age;
    }

## NewHtml.java
        String newHtml = """
                <html>
                 <head>
                     <title>
                         Hello Text Block
                     </title>
                 </head>
                 <body>
                 </body>
                </html>

## OldHtml.java
String oldHtml = "<html>\n" +
                "<head>\n" +
                "    <title>\n" +
                "        Hello Text Block\n" +
                "    </title>\n" +
                "</head>\n" +
                "<body>\n" +
                "</body>\n" +
                "</html>";

## NewSwitchExample.java
 private static void getDayStatus(WeekDay day) {
        switch (day) {
            case SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY -> System.out.println("On day");
            case FRIDAY, SATURDAY -> System.out.println("Off day");
        }
    }

## OldSwitchExample.java
private static void getDayStatus(WeekDay day) {
        switch(day) {
            case SUNDAY:
            case MONDAY:
            case TUESDAY:
            case WEDNESDAY:
            case THURSDAY:
                System.out.println("On day");
                break;
            case FRIDAY:

## vscode_shortcuts.md

      
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                nowshad-hasan
                / vscode_shortcuts.md
            
            
              Created
              April 30, 2021 08:03
                — forked from bradtraversy/vscode_shortcuts.md
            
              
                Helpful shortcuts for VSCode
              
          
    VSCode Shortcuts


List of helpful shortcuts for faster coding

If you have any other helpful shortcuts, feel free to add in the comments of this gist :)
Official List of all commands


Windows
Mac


## PolymorphicMethodOverloading.java
public class PolymorphicMethodOverloading {

    public static void main(String[] args) {
        Consumer consumer = new Consumer();
        Parent p1 = new Parent();
        Parent p2 = new Child1();
        Parent p3 = new Child2();
        Child1 p4 = new Child1();
        Child2 p5 = new Child2();
	// Which classes are permitted to extend this Liquid class, must be sealed/non-sealed/final.
	public sealed class Liquid permits Water, Honey, Milk {}

	// Now, Water can be extended by any class
	public non-sealed class Water extends Liquid {}

	// Honey is final. So, it can't be extended by anyone.
	public final class Honey extends Liquid {}

	// Milk is sealed. So, it starts another sealed hierarchy.
	static void printBookOld(Book book) {
	if (book instanceof Thriller) {
	Thriller thriller = (Thriller) book; // must-do explicit casting
	System.out.println(thriller.getSuspense());
	} else if (book instanceof AutoBiography) {
	AutoBiography biography = (AutoBiography) book; // must-do explicit casting
	System.out.println(biography.getContribution());
	}
	}
	public class OldStudent{

	private String name;
	private int age;

	public OldStudent(String name, int age) {
	this.name = name;
	this.age = age;
	}
	String newHtml = """
	<html>
	<head>
	<title>
	Hello Text Block
	</title>
	</head>
	<body>
	</body>
	</html>
	String oldHtml = "<html>\n" +
	"<head>\n" +
	" <title>\n" +
	" Hello Text Block\n" +
	" </title>\n" +
	"</head>\n" +
	"<body>\n" +
	"</body>\n" +
	"</html>";
	private static void getDayStatus(WeekDay day) {
	switch (day) {
	case SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY -> System.out.println("On day");
	case FRIDAY, SATURDAY -> System.out.println("Off day");
	}
	}
	private static void getDayStatus(WeekDay day) {
	switch(day) {
	case SUNDAY:
	case MONDAY:
	case TUESDAY:
	case WEDNESDAY:
	case THURSDAY:
	System.out.println("On day");
	break;
	case FRIDAY:
	public class PolymorphicMethodOverloading {

	public static void main(String[] args) {
	Consumer consumer = new Consumer();
	Parent p1 = new Parent();
	Parent p2 = new Child1();
	Parent p3 = new Child2();
	Child1 p4 = new Child1();
	Child2 p5 = new Child2();