Cannot Be Resolved Java Error
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to make sure its a valid code, and then display if it is or not. I've got quite a few errors with the current program that I have and I can't seem to figure it out. This is the code that I have so far: public class Upc { private long upc; public Upc(long upcs) { upc = upcs; } public long getUpc() { int m = (n2 + n4 + n6 + n8 + n10); long n = (n1 + n3 + n5 + n7 the import cannot be resolved java + n9 + n11); long r = (10 - (m + 3 * n) % 10); long n12 = (int) (upc % 10); upc /= 10; long n11 = (int) (upc % 10); upc /= 10; long n10 = (int) (upc % 10); upc /= 10; long n9 = (int) (upc % 10); upc /= 10; long n8 = (int) (upc % 10); upc /= 10; long n7 = (int) (upc % 10); upc /= 10; long n6 = (int) (upc % 10); upc /= 10; long n5 = (int) (upc % 10); upc /= 10; long n4 = (int) (upc % 10); upc /= 10; long n3 = (int) (upc % 10); upc /= 10; long n2 = (int) (upc % 10); upc /= 10; long n1 = (int) (upc % 10); if (r == n12) { return (upc + " is a feasible UPC code"); } else { return (upc + " is an invalid UPC code"); } } } and my errors are as follows: 13 errors found: File: C:\Users\Andrew\Downloads\Upc.java [line: 10] Error: n2 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 10] Error: n4 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 10] Error: n6 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 10] Error: n8 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 10] Error: n10 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 11] Error: n1 cannot be resolved to a variable File: C:\Users\Andrew\Downloads\Upc.java [line: 11] Error: n3 cannot be resolved to a variable File: C:\Users\Andrew\Down
error and eclipse is telling me my finalAmount variable can't be resolved. From looking at it I know it's outside of the scoop of the for statement and everytime I create a local variable and assign a value base64 cannot be resolved java to it (it's zero) my program gets messed up. My question is, how would I declare
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the finalAmount variable locally? Thanks import java.util.Scanner; public class CompoundInterest { public static void main(String[] args){ double rate; double amount; double year; System.out.println("This
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program, with user input, computes interest.\n" + "It allows for multiple computations.\n" + "User will input initial cost, interest rate and number of years."); Scanner input = new Scanner(System.in); System.out.println("What is the inital cost?"); amount = input.nextDouble(); System.out.println("What is http://stackoverflow.com/questions/8177913/java-error-message-cannot-be-resolved-to-a-variable the interest rate?"); rate = input.nextDouble(); rate = rate/100; System.out.println("How many years?"); year = input.nextDouble(); for(int x = 1; x < year; x++){ double finalAmount = amount * Math.pow(1.0 + rate, year); // the below works but the problem is, it prints the statement out many times. I don't want that. /* System.out.println("For " + year + " years an initial " + amount + " cost compounded at a rate of " + rate + " https://teamtreehouse.com/community/java-cannot-be-resolved-to-a-variable will grow to " + finalAmount); */ } System.out.println("For " + year + " years an initial " + amount + " cost compounded at a rate of " + rate + " will grow to " + finalAmount); } } 1 Answer omars 9,006 Points omars omars 9,006 Points almost 3 years ago Shane, Q: "eclipse is telling me my finalAmount variable can't be resolved" A: This is because you are declaring 'finalAmount' within the for loop. Once your for loop exits, 'finalAmount' goes out of scope. Meaning, Java has no clue it ever existed. Q: "My question is, how would I declare the finalAmount variable locally?" A: From what I know, you cannot declare a variable within a loop of any kind if you want to retain the previous value. When you declare a variable within a loop this is what happens: Your loop begins with an initial value of 0. (This is before the calculation takes place, double finalAmount;) A value is calculated and assigned to finalAmount. Your loop ends. If you loop condition is still valid (x < year), repeat from step one (finalAmount is redeclared and initialized). Someone please correct me if I said anything wrong about the above steps. Here is my suggested change to your code, I hope this helps. import java.util.Scanner; public class CompoundInterest { public static void main(String[] args){ double rate;
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New Topic programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Beginning Java Eclipse Error " Cannot be resolved to a variable" Morrice Pfeiffer Greenhorn Posts: 1 posted 2 years ago Hi Everyone Just a noob doing what I can and sometimes even the small stuff is painful. ( at least for me) Couple of things. Below is the code. The error "cannot resolve to a variable". I get the error I just can't seem to fix the error. Also any thoughts on some good learning material. Presently I am working my way through the Oracle docs and that seems ok. Java for Dummies, Sams teach Yourself Java in 21 Days, plus my favorite Head First Java. Thanks Code below.... package tutorial; import java.util.*; public class HolidaySked { BitSet sked; public HolidaySked(){ sked = new BitSet (365); int [] holiday = {1,15,50,148,185,246,281, 316,326,359}; for (int i = 0; i