Would you explain diff between int and integer?

Answer 1

In Java, int is a primitive data type that is used to hold numeric values. for example an int variable can be used to hold your age in a Java program.

Integer is the Wrapper class for the int data type. In Java there are a lot of in built features that work only on objects. under such circumstances we can wrap the primitive data type in its wrapper and use it.

For example:

int x = 10;

Integer xObj = newInteger(x);

if you want to know the value contained in xObj, then we use the method intValue().

xObj.intValue() would return the value 10 contained in it.