Thread: Help with a java assignment?

theres an error where the IF statement begins, telling me it cannot call a non-static method cannot be referenced from a static context.

When you get errors, please copy and paste here the full text. The message includes the line number and the statement with the error.
Please copy full text of error message and paste it here. Here is a sample:

TestSorts.java:138: cannot find symbol
symbol  : variable var
location: class TestSorts
         var = 2;
         ^

non-static method cannot be referenced from a static context

This means that in a static method you are trying to reference a method that will only exist in an instance of the class. To get to that method you need to create an instance of the class and use that to call the method.
AClass aCls = new AClass(); // create an instance of the class
aCls.theMethod(); // use the reference to AClass to call theMethod()


Or you can make the method static, the same as the main method.

Noted and thank you for the tip. Here's the error message:

Line 22: non-static method aSalary(int) cannot be referenced from a static context

incompatible types
required: boolean
found: int

Edit: Whenever I save the project, it suddenly says theres another error on Line 5, saying that its missing a return statement.

Problems:
0. When you post code, please use the "CODE" tags.

1. You make a reference to a variable outside of your current scope.

public int aSalary(int salary) {
if (salary <= 0){
return 0;
} else {
salary = (sales * 0.09) + 200; //<----- sales is not in scope
}

2. Your class does not contain a constructor, which is okay if the class is static and has only static members and methods.

public class Salary {                 //add static keyword
 
public int aSalary(int salary) {                         //add static keyword
if (salary <= 0){
return 0;
} else {
salary = (sales * 0.09) + 200; //<----- sales is not in scope
}
 
}

3. Your main method does not create a new instance of class Salary if not static and doesn't reference Salary if it is supposed to be static.

public static void main(String[] args) {
Scanner input = new Scanner ( System.in );
// Salary salary = new Salary();                                     //not present, not needed if static
System.out.print( "Please enter the amount of items sold by the employees:");
String sales = input.nextLine();
String salesArray[] = sales.split(" ");
for(int i=0; i<salesArray.length; i++){
System.out.print(salesArray[i] + " ");
if(aSalary(Integer.parseInt(salesArray[i&#8230;                        // your code, change to
 
//if(Salary.aSalary(Integer.parseInt(salesArray[i…
 
System.out.println("is even");
else
System.out.println("not even");
}
 
}

You don't have a return statement.

public static int aSalary(int sales) { //line 5, error: missing return statement
double salary;
if (sales <= 0){
salary = 0;
} else {
salary = (sales * 0.09) + 200;
}

Change to:

public static int aSalary(int sales) {
if (sales <= 0){
return 0;
} else {
return (int)((double)(sales) * 0.09 + 200);     // java does not implicitly cast int to double in expressions, it truncates
}

Addition:

if(aSalary(Integer.parseInt(salesArray[i]))) // this is not a boolean expression

Salary.aSalary() returns an integer, you cannot use it as a boolean
I think you forgot the modulus...

if( aSalary( Integer.parseInt( salesArray[i] ) )%2==0 )