class AutoboxingDemo
{
	public static void main(String s1[])
	{
		Integer a=new Integer(10);
		int b=a;	//autoboxing
		System.out.println(b);
	}
}

10

class AutoboxingDemo
{
	public static void main(String s1[])
	{
		float a=100.10f;
		System.out.println(a);
		Float r=new Float (a);
		float c=r.floatValue();
		System.out.println(c);
	}
}

100.1
100.1

class WrapperDemo
{
	public static void main(String s1[])
	{
		Integer i=new Integer(42);
		//first method
		int b=i.intValue();	//showing intValue() method
		byte c=i.byteValue();	//showing byteValue() method
		float d=i.floatValue();	//showing floatValue() method
		System.out.println(b);
		System.out.println(c);
		System.out.println(d);
		//second method
		int x=Integer.parseInt("100");	
		double y=Double.parseDouble("90.10");
		System.out.println(x);
		System.out.println(y);
		//third method
		String s=Integer.toHexString(254);
		String s2=Long.toOctalString(254);
		String s3=Integer.toBinaryString(254);
	}
}

42
42
42.0
100
90.1

class CastingDemo
{
	public static void main(String s1[])
	{
		byte a= 10;
		int b=a;	//implicit casting 
		float x=b;	//implicit casting 
		System.out.println(b);
		System.out.println(x);
		
		int c=100;
		//explicit cast (convert bigger type into smaller type), 
		//and programmer has to do explicitly
		byte d=(byte)c;	
		System.out.println(d);
	}
}

10
10.0
100

class CastingDemo
{
	public static void main(String s1[])
	{
		byte a=10;
		byte b=20;
		//explicit casting  
		byte c=(byte)(a+b);
		System.out.println(c);
	}
}

30