Java – Cannot Find Symbol

java

I have created a small Java application to automatically test some expressions for a true/false condition.

I am getting two compiler errors in both jGRASP and with the javac command.

The code follows:

public class MathTest {
    public static void main(String[] args) {

        int x = 10;
        int y = 20;
        int z = 30;
        String string1 = "six";
        String string2 = "six";

        if (x < 10 || x > 10)
            System.out.print("True");
        else
            System.out.print("False");

        if (z - y == x && Math.abs(y - z) == z)
            System.out.print("True");
        else
            System.out.print("False");

        if (x < 10 && x < 10)
            System.out.print("True");
        else
            System.out.print("False");

        if (string1.equals(string2))
            System.out.print("True");
        else
            System.out.print("False");
        if (x > y || y > x)
            System.out.print("True");
        else
            System.out.print("False");

        if (!(x < y + z) || !(x + 10 <= 20))
            System.out.print("True");
        else
            System.out.print("False");

        if (string1 == string2)
            System.out.print("True");
        else
            System.out.print("False");

    }
}

The error message is:

    MathTest.java:14: cannot find symbol
    symbol  : method abs(int)
    location: class Math
    if(z - y == x && Math.abs(y - z) == z)
                     ^
    ./Math.java:13: cannot find symbol
    symbol  : method abs(int)
    location: class Math
    if(z - y == x && Math.abs(y - z) == z)
                     ^
    2 errors

What am I doing wrong?

In the unlikely event that my instructor or any administrator from Salt Lake Community College ever comes across this question, let me make my intentions clear. This question is posted in the greatest spirit of academic honesty. I ask this question to seek general advice and help in understanding the proper way to use the Java programming language. I in no way use the work of others and represent it as my own work. I use the answers provided here as a general aid in my understanding. I do all my own work and do not copy work provided by people answering my question.

Best Solution

You have a Math class, and you're attempting to use the abs() method.

The question is: Is it your intention to provide this function or are you trying to use the one in java.lang.Math?

For the first, you have to make sure you're declaring that function.

For the second you have to make sure you're using the correct parameters types; see Math.

Does your Math class have the abs method?

It seems like your Math class is shadowing the Math class that comes in the core of the language.

Your Math class is loaded and the abs method could not be found (hence the "Cannot find symbol" message)

Related Question