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Wrapper

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1How to convert primitive value to wrapper object?valueOf()
z.B.
Integer num1 = Integer.valueOf(billNo);
2How to convert wrapper object to primitive valueintValue()
int billNo = num1.intvalue();
doubleValue()
3How is it called the conversion from primitive data type to objectautoboxing
4How is it called if one wrapper object is unwrapped into a primitve value?unboxing
5How to convert String to primitive?parseInt()
String num = "2345"
int billNo = Integer.parseInt(num);
oder:
Double.parseDouble(num)