convert Integer to int

Question

I have an Integer value of variable as below:

Integer programNumber= ........

I took the program number as Integer type. However in my other class, I want to check whether this variable, programNumber, equals variable which is the type of int.

To sum up, I want to convert the variable of the of Integer to int primitive value. I used programno.intValue() but it doesn't work. Thanks in advance.

I have a two class, BasvuruKisi and Program. the code snippet is below:

BasvuruKisi bsvkisi = (BasvuruKisi) (this.getHibernateTemplate().find("from BasvuruKisi bsv where bsv.basvuruNo=?", basvuruNumaralari.get(i))).get(0);

        if (bsvkisi != null) {
            int yetkiVarmi = 0;
            Integer programno= bsvkisi.getProgramId();
           List array = 

this.getHibernateTemplate().find("from Program p where p.id=?", programno.intValue());

but

this.getHibernateTemplate().find("from Program p where p.id=?", programno.intValue());

this one doesn't work. return firstly, no table or view is available despite available and then returns null pointer exception. thanks

Answer 1

The variable name in the initialization block says programNumber, but the variable in the method call is programno. Which is it?

Using the wrong variable name shouldn't give you a null pointer exception, unless you have another variable named programno defined somewhere.

Whatever the variable name is, make sure you initialize it before you get the intValue.

Answer 2

Validate programNumber is null or not?

If the value is null, it throws Exception.

Integer programNumber= null;
System.out.println(programNumber.intValue());