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package chapter11;

// TypeCastingEx3.java

public class TypeCastingEx3{

/**

* Upcasting and downcasting with Number, Integer, Float etc.

*

* @param args

*/

public static void main(String[] args) {

Number n, n1;

Integer i = 5;

Double d = 2.5;

// Upcasting, putting Double and Integer to Number. No issues. Compiler

// does this automatically.

n = i;

n1 = d;

// Now its time for downcasting. The following code segment will not

// compile. Although we did the reverse in the upper segment, compiler

// throws an error while doing this. Try this by uncommenting.

/*

* i = n; d = n1;

*/

// So, to downcast properly, we need to explicitly cast it

// appropriately.

//i = n; // Type mismatch: cannot convert from Number to Integer

//d = n1; // Type mismatch: cannot convert from Number to Double

i = (Integer) n;

d = (Double) n1;

System.out.println("Here i = " + i + " (Integer) n : " + (Integer) n );

System.out.println("Here d = " + d + " d = (Double) n1: " + (Double) n1 );

}

}