错误解析变量和左侧分配并计算++令牌

Question

I'm starting to get blind looking at my code and my brain is about to overheat. I'm new when it comes to programming.

public class RecyclingSystem {

public static void main(String[] args) {

System.out.println("Please put in a valid bottle");


    Scanner sc = new Scanner(System.in);



    while ( sc.nextInt() != -1) {

        if (sc.nextInt(char a) = getaBottle);
                int bottleAcount++;
    } else if { (sc.nextInt(char b) = getbBottle);
                int bottleBcount++;
    } else if { (sc.nextInt(char c) = getcBottle);
                int bottleCcount++;
    } else { throw new EmptyStackException(); 
        System.out.println("Bottle not recognized");
    }
    System.out.println("The total number of bottles is " + totalBottlecount);
    System.out.println();
    System.out.println("The total amount returned is " + sumOfBottles );
    }
    sc.close();
}

}}

public class Bottle {

private static final double A_BOTTLE = 1.0;
/**
 * @return the aBottle
 */
public static double getaBottle() {
    return A_BOTTLE;
}
/**
 * @return the bBottle
 */
public static double getbBottle() {
    return B_BOTTLE;
}
/**
 * @return the cBottle
 */
public static double getcBottle() {
    return C_BOTTLE;
}
private static final double B_BOTTLE = 1.5;
private static final double C_BOTTLE = 3.0;

}

public class EmptyStackException extends Exception {

}

public class bottleCount {

int bottleAcount = 0;

int bottleBcount = 0;

int bottleCcount = 0; 

int totalBottleCount = bottleAcount + bottleBcount + bottleCcount;

}

I have seperate classes for the getbottle, totalBottlecount and bottlecount variables.

I want to make a user-input based recycling system simulator, if that makes any sense, with 3 different types of bottles, which are assigned different values, a total bottle count and the sum of the values of the 3 bottle types combined.

I get several compiler errors and I have spend HOURS trying to resolve them all, but every time I do, new errors occur and now I get a "coders-block".

I get asked to delete the ++ tokens, the compiler cannot resolve my variables and syntax errors. I would really appreciate some insight, since I'm only ~3weeks into java programming.

UPDATED: Compiler errors exact copy pasta

Multiple markers at this line
    - Syntax error, insert ")" to complete Expression
    - Duplicate method nextInt(char) in type RecyclingSystem
    - Syntax error, insert "}" to complete Block
    - Syntax error, insert "AssignmentOperator Expression" to complete Assignment
    - Return type for the method is missing
    - Syntax error on tokens, delete these tokens
    - The left-hand side of an assignment must be a variable
    - Syntax error, insert "AssignmentOperator Expression" to complete Expression
    - The left-hand side of an assignment must be a variable
    - Syntax error, insert ";" to complete BlockStatements
    - Syntax error on tokens, delete these tokens
    - Syntax error on token ")", { expected after this token
    - Syntax error, insert ";" to complete Statement

Answer 1

int bottleAcount++;

In java you need to declare the local variable like

type name = intial value;

then do any operation on that like increament or decrement.

In youe case declar the variable before while loop with zero as intial value like

int  bottleAcount = 0;

then inside while increament it by 1, like bottleAcount++;

or

bottleAcount += 1;

Answer 2

So... If this is all the code there are many problems and what can I recommend in the beginning - go back to some basic Java programming course.

Let's look at one of the first lines:

if (sc.nextInt(char a) = getaBottle);

• Firstly, it's a condition, and you are assigning the value of a getaBottle to the sc.nextInt(char a) .
• Secondly, nextInt(char a) looks like method declaring, not like a method call.
• Thirdly, getaBottle is never declared before
• Fourthly, you have a getaBottle() method in a Bottle class, which you probably want to use instead of getaBottle which is (should) be a variable

...etc., etc.

This code is not even valid Java code. It's hard to help you somehow in that problem, you just need to learn a bit more, which I encourage you to do.

Good luck and in case of any specific question - come and ask!

Answer 3

else if { (sc.nextInt(char b) = getbBottle);
                int bottleBcount++;
    }

Syntax is totally wrong for if.Also condition is checked using == not = It should be :

else if (sc.nextInt(char b) == getbBottle);
                int bottleBcount++;

Also you cant do int bottleBcount++ . Its meaningless. Since you already declared bottleBcount in another class, you have to access it using the object of that class. Before that change the declaration in the class from int bottleAcount = 0; to public int bottleAcount = 0; . Do this for all bottles. Now you can use it as :

public static void main(String[] args) {

System.out.println("Please put in a valid bottle");

     bottleCount counter = new bottleCount();
    Scanner sc = new Scanner(System.in);



    while ( sc.nextInt() != -1) {

        if (sc.nextInt(char a) == getaBottle);
                counter.bottleAcount++;
    } else if (sc.nextInt(char b) == getbBottle);
                counter.bottleBcount++;
    else if (sc.nextInt(char c) == getcBottle);
                counter.bottleCcount++;
     else { throw new EmptyStackException(); 
        System.out.println("Bottle not recognized");
    }
    System.out.println("The total number of bottles is " + totalBottlecount);
    System.out.println();
    System.out.println("The total amount returned is " + sumOfBottles );
    }
    sc.close();
}

Also the statement int totalBottleCount = bottleAcount + bottleBcount + bottleCcount; doesnt make sense. It won't work as you wanted it to. You need to write a function to do this addition and then call it. Or if you want this to happen just once ( which I doubt) , you can put it in a constructor.

I suggest you brush up on class and variable declaration concepts before proceeding

Answer 4

You just have problem in this:

else { 
    throw new EmptyStackException(); 
    System.out.println("Bottle not recognized");
}

Check the proper syntax and error will be resolved.