Basics of Programming

Trick1

1. String equals vs ==
public static void main(String[] args)
  {
    
    System.out.println("abc"=="abc");
    System.out.println("abc".equals("abc"));
    OtherClass my1=new OtherClass("Hello");
    OtherClass my2=new OtherClass("Hello");
    System.out.println(my1==my2);
    System.out.println(my1.equals(my2));
  }
  2. Class implementing two interfaces
  	public class HelloWorld
	{
	  // arguments are passed using the text field below this editor
	  public static void main(String[] args)
	  {
	    OtherClass myObject = new OtherClass("Hello World!");
	    System.out.println(myObject);
	    System.out.println(myObject.getNum(2,3));
	    
	    I1 myObject1 = new  OtherClass("New Object!");
	    System.out.println(myObject1.getNum(2,3));
	    
	    I2 myObject2 = new  OtherClass("New Object!");
	    System.out.println(myObject2.getNum(2,3));
	  }
	}
	
	// you can add other public classes to this editor in any order
	public class OtherClass implements I1,I2
	{
	  private String message;
	  private boolean answer = false;
	  public OtherClass(String input)
	  {
	    message = "Why, " + input + " Isn't this something?";
	  }
	  public String toString()
	  {
	    return message;
	  }
	  
	  public int getNum(int num1, int num2){
	  	return num1+num2;
	  }
	  
	}
	
	interface I1{
		int getNum(int num1, int num2);
	}
	
	interface I2{
		int getNum(int num1, int num2);
	}
  
3. 0=="0" in JS
function display(){
      console.log("0"==0);
      console.log(""==0);
      console.log("1"==0);
    console.log("1"===0);
    console.log(0=="0");
    console.log(0=="");
     console.log(1=="");
    console.log(1=="6");
    console.log(1=="1");
    console.log(true=="6");//Check
    console.log(true==[1]);
  }
  
 4. setTimeout Syntax
 	a. function display(){
	for(var i=0;i<=6;i++){
		setTimeout(function(){
			console.log(i);
		},5);
	}
}
//undefined
	b.  
	function display(){
		for(var i=0;i<=6;i++){
			setTimeout(console.log(i),5);
		}
	}
	//0 1 2 3 4 5 6
5.     System.out.println(2+ +3 - -4); //9