Not a statement java ошибка перевод

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int a, b, c, d, x = 4572;

a = x / 1000;
b = x % 1000 / 100;
c = x % 100 / 10;
d = x % 10;

System.out.println(x/(d+b));
> else
System.out.println(x/(c+a));

тут еще нужно ввести, что d+b не равно 0
d+b!=0
где это написать и как правильно написать, чтобы не выскакивал ошибка not a statement
thank you

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Understanding Common Errors In Java

When we were building our automated common error feedback feature on Mimir Classroom, we analyzed millions of stack traces that our students received when completing their coursework on our platform. In this post, you will find the errors we found to be most troubling to students in Java and some tips on how to approach them.

To start off, here is a quick refresher on how to read an error in the Java stack trace.

1. ’;’ expected

This error means that you forgot a semicolon in your code. If you look at the full error statement, it will tell you where in your code you should check within a few lines. Remember that all statements in Java must end in a semicolon and elements of Java like loops and conditionals are not considered statements.

2. cannot find symbol

This error means that Java is unable to find an identifier that it is trying to work with. It is most often caused by the following:

• You misspelled a variable name, class name, or a keyword somewhere. Remember that Java is case sensitive.
• You are trying to access a variable or class which does not exist or can not be accessed.
• You forgot to import the right class.

3. illegal start of expression

This error usually occurs when your code does not follow Java’s standard structure. Check the nesting of your variables and ensure that all your and ( ) are in the right place..

4. class, interface, or enum expected

This error is usually caused by misplaced . All code in Java needs to be contained within a class, interface, or enum. Ensure that all of your code is within the of one of those. We often have seen this error when there is an extra > at the end of your code.

5. reached end of file while parsing

This error usually occurs when you are missing a > somewhere in your code. Ensure that for every in the right place.

6. missing return statement

This error usually means one of two things:

• Your method is expecting a return statement but is missing one. Ensure that if you declared a method that returns something other than void and that it returns the proper variable type.
• Your return statements are inside conditionals who’s parameters may not be reached. In this case, you will need to add an additional return statement or modify your conditionals.

7. ‘else’ without ‘if’

This error means that Java is unable to find an if statement associated to your else statement. Else statements do not work unless they are associated with an if statement. Ensure that you have an if statement and that your else statement isn’t nested within your if statement.

8. ‘(‘ expected or ‘)’ expected

This error means that you forgot a left or right parenthesis in your code. If you look at the full error statement, it will tell you where in your code you should check. Remember that for every ( you need one ).

9. case, default, or ‘>’ expected

This error means that your switch statement isn’t properly structured. Ensure that your switch statement contains a variable like this: switch (variable). Also ensure that every case is followed by a colon (:) before defining your case.

10. ‘.class’ expected

This error usually means that you are trying to declare or specify a variable type inside of return statement or inside of a method calls. For example: “return int 7;» should be «return 7;»

11. invalid method declaration; return type required

Every Java method requires that you declare what you return even if it is nothing. «public getNothing()» and «public static getNumber()» are both incorrect ways to declare a method.

The correct way to declare these is the following: «public void getNothing()» and «public static int getNumber()»

12. unclosed character literal

This error occurs when you start a character with a single quote mark but don’t close with a single quote mark.

13. unclosed string literal

This error occurs when you start a string with a quotation mark but don’t close with a second quotation mark. This error can also occur when quotation marks inside strings are not escaped with a backslash.

14. incompatible types

This error occurs when you use the wrong variable type in an expression. A very common example of this is sending a method an integer when it is expecting a string. To solve this issue, check the types of your variables and how they are interacting with other types. There are also ways to convert variable types.

15. missing method body

This error commonly occurs when you have a semicolon on your method declaration line. For example «public static void main(String args[]);». You should not have a semicolon there. Ensure that your methods have a body.

16. unreachable statement

This error means that you have code that will never be executed. Usually, this is after a break or a return statement.

Types of Errors in Java with Examples

Error is an illegal operation performed by the user which results in the abnormal working of the program. Programming errors often remain undetected until the program is compiled or executed. Some of the errors inhibit the program from getting compiled or executed. Thus errors should be removed before compiling and executing.

The most common errors can be broadly classified as follows:

1. Run Time Error:

Run Time errors occur or we can say, are detected during the execution of the program. Sometimes these are discovered when the user enters an invalid data or data which is not relevant. Runtime errors occur when a program does not contain any syntax errors but asks the computer to do something that the computer is unable to reliably do. During compilation, the compiler has no technique to detect these kinds of errors. It is the JVM (Java Virtual Machine) that detects it while the program is running. To handle the error during the run time we can put our error code inside the try block and catch the error inside the catch block.

For example: if the user inputs a data of string format when the computer is expecting an integer, there will be a runtime error. Example 1: Runtime Error caused by dividing by zero