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Java Forum / GUI / June 2007'{' expected
hi everyone, I'm new to the java world and I'm need of dire help, I have been given an assignment and for some reason I cannot compile, I keep getting the same error and even when I add an extra bracket the error gets greater, here is the program and hopefully someone can help me out. import java.text.DecimalFormat; public class Mortgage Payment Calculator { //initialize numerical values public static void main(String[] args) { //declared variables int loanamount = 200000; double MP; double Principal=200000; int[] months= new int[3]; months[0] = 84; months[1] = 180; months[2] = 360; //calculate double[] interestrate= new double[3]; interestrate[0] = .0535; interestrate[1] = .0550; interestrate[2] = .0575; DecimalFormat twoplaces = new DecimalFormat("0,000.00"); //calculate System.out.println("\tMortgage Payment Calculator\n"); //looping in progress for(int counter = 1; counter <=12; counter++); { //calculate PayMonthly = (loantotal * interestRate[i] / (1 - Math.pow(1/(1 + interestRate[i]),loanlength[i]*12))); { //calculate System.out.println("\tLoan Amount 1 = " + loanamount); System.out.println("\tYear Term is = " + yearterm[counter]); System.out.println("\tInterest Rate = " + interestrate[counter]*100); System.out.println("\tMonthly Payment is " + twoplaces.format(MP)); } } } } } >hi everyone, I'm new to the java world ... An inappropriate time to be taking on GUI'd applications. >...and I'm need of dire help, Best help for beginners is available on comp.lang.java.help >...I >have been given an assignment and for some reason I cannot compile, I >keep getting the same error ... What error? Always copy/paste compile and runtime error output. >...and even when I add an extra bracket the >error gets greater, here is the program and hopefully someone can help [quoted text clipped - 3 lines] > >public class Mortgage Payment Calculator { D:\MortgagePaymentCalculator.java:3: '{' expected public class Mortgage Payment Calculator { ^ [hint]Java class names can not contain spaces[/hint]  SignatureAndrew Thompson http://www.athompson.info/andrew/ > pac...@aol.com wrote: > >hi everyone, I'm new to the java world ... [quoted text clipped - 30 lines] > > Message posted via JavaKB.comhttp://www.javakb.com/Uwe/Forums.aspx/java-gui/200706/1 Thanks Andrew, I closed the gaps and still this thing is making fun of me, still getting the same error > hi everyone, I'm new to the java world and I'm need of dire help, I > have been given an assignment and for some reason I cannot compile, I [quoted text clipped - 5 lines] > > public class Mortgage Payment Calculator { ... > } > > } > } > } You should really cite all the information, including the full, *copied* and pasted error message, within the body of the message, rather than merely hinting at it in the subject. Nonetheless, it is clear what your difficulty is. The error said '{' (left brace) expected, not right brace ('}'), so clearly adding right braces will not help. Adding more right braces would help even less. Why did you think right braces would help an error that refers to left races? Where would the compiler expect a left brace? The first place is just after the class name in the class declaration: > public class Mortgage Payment Calculator { but instead of a left brace, the compiler finds a token 'Payment' - whoops, a left brace '{' expected, but not found! You have three class names in the declaration instead of only one. Just use one. SignatureLew > hi everyone, I'm new to the java world and I'm need of dire help, I > have been given an assignment and for some reason I cannot compile, I [quoted text clipped - 5 lines] > > public class Mortgage Payment Calculator { ... > } > [quoted text clipped - 3 lines] > } > } You should really cite all the information, including the full, *copied* and pasted error message, within the body of the message, rather than merely hinting at it in the subject. Nonetheless, it is clear what your difficulty is. The error said '{' (left brace) expected, not right brace ('}'), so clearly adding right braces will not help. Adding more right braces would help even less. Why did you think right braces would help an error that refers to left braces? Where would the compiler expect a left brace? The first place is just after the class name in the class declaration: > public class Mortgage Payment Calculator { but instead of a left brace, the compiler finds a token 'Payment' - whoops, a left brace '{' expected, but not found! You have three class names in the declaration instead of only one. Just use one. SignatureLew > pac...@aol.com wrote: > > hi everyone, I'm new to the java world and I'm need of dire help, I [quoted text clipped - 38 lines] > > - Show quoted text - /* MortgagePaymentCalculatorCR1.java */ import java.text.DecimalFormat; public class MortgagePaymentCalculatorCR1.java:3:{ //initialize numerical values public static void main(String[] args) //declared variables int loanamount = 200000; double MP; double Principal=200000; int[] months= new int[3]; months[0] = 84; months[1] = 180; months[2] = 360; //calculate double[] interestrate= new double[3]; interestrate[0] = .0535; interestrate[1] = .0550; interestrate[2] = .0575; DecimalFormat twoplaces = new DecimalFormat("0,000.00"); //calculate System.out.println("\tPayment Calculator\n"); //looping in progress for(int counter = 1; counter <=12; counter++) //calculate PayMonthly = (loantotal * interestRate[i] / (1 - Math.pow(1/(1 + interestRate[i]),loanlength[i]*12))); //calculate System.out.println("\tLoan Amount 1 = " + loanamount); System.out.println("\tYear Term is = " + yearterm[counter]); System.out.println("\tInterest Rate = " + interestrate[counter]*100); System.out.println("\tMonthly Payment is " + twoplaces.format(MP)); } this is what I have done so far and the following errors are '{' expected line 7 '}' expected line 55 > /* > MortgagePaymentCalculatorCR1.java [quoted text clipped - 3 lines] > > public class MortgagePaymentCalculatorCR1.java:3:{ This is just plain wrong. You don't put colons or periods in class names. What are you using to teach you the language? Doesn't it explain what the valid characters are for Java identifiers? SignatureLew > pac...@aol.com wrote: > > /* [quoted text clipped - 12 lines] > -- > Lew I think I missed that one, I'm really not very good at this, I got rid of the colons and periods and now I'm getting ';' expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected <identifier> expected illegal start of type <identifier> expected <identifier> expected <identifier> expected <identifier> expected <identifier> expected >> pac...@aol.com wrote: >>> /* [quoted text clipped - 33 lines] > <identifier> expected > <identifier> expected Once again, *copy* and paste the *entire* error message, along with the SSCCE (simple, self-contained correct (compilable) example) that causes it. We can't keep guessing at what the trouble is with incomplete information. SignatureLew On Jun 12, 8:02 pm, pac...@aol.com wrote: > > pac...@aol.com wrote: > > > /* [quoted text clipped - 38 lines] > > - Show quoted text - okay here it is. F:\New Folder\MortgagePaymentCalculatorCR1.java:53: <identifier> expected System.out.println("\tMonthly Payment is " + twoplaces.format(MP)); ^ 20 errors Process completed. --------------------Configuration: <Default>-------------------- Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -client to select the "client" VM -server to select the "server" VM -hotspot is a synonym for the "client" VM [deprecated] The default VM is client. -cp <class search path of directories and zip/jar files> -classpath <class search path of directories and zip/jar files> A ; separated list of directories, JAR archives, and ZIP archives to search for class files. -D<name>=<value> set a system property -verbose[:class|gc|jni] enable verbose output -version print product version and exit -showversion print product version and continue -? -help print this help message -X print help on non-standard options -ea[:<packagename>...|:<classname>] -enableassertions[:<packagename>...|:<classname>] enable assertions -da[:<packagename>...|:<classname>] -disableassertions[:<packagename>...|:<classname>] disable assertions -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions Process completed. --------------------Configuration: <Default>-------------------- Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -client to select the "client" VM -server to select the "server" VM -hotspot is a synonym for the "client" VM [deprecated] The default VM is client. -cp <class search path of directories and zip/jar files> -classpath <class search path of directories and zip/jar files> A ; separated list of directories, JAR archives, and ZIP archives to search for class files. -D<name>=<value> set a system property -verbose[:class|gc|jni] enable verbose output -version print product version and exit -showversion print product version and continue -? -help print this help message -X print help on non-standard options -ea[:<packagename>...|:<classname>] -enableassertions[:<packagename>...|:<classname>] enable assertions -da[:<packagename>...|:<classname>] -disableassertions[:<packagename>...|:<classname>] disable assertions -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions Process completed. --------------------Configuration: <Default>-------------------- Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -client to select the "client" VM -server to select the "server" VM -hotspot is a synonym for the "client" VM [deprecated] The default VM is client. -cp <class search path of directories and zip/jar files> -classpath <class search path of directories and zip/jar files> A ; separated list of directories, JAR archives, and ZIP archives to search for class files. -D<name>=<value> set a system property -verbose[:class|gc|jni] enable verbose output -version print product version and exit -showversion print product version and continue -? -help print this help message -X print help on non-standard options -ea[:<packagename>...|:<classname>] -enableassertions[:<packagename>...|:<classname>] enable assertions -da[:<packagename>...|:<classname>] -disableassertions[:<packagename>...|:<classname>] disable assertions -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions Process completed. ';' expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected ']' expected <identifier> expected <identifier> expected illegal start of type <identifier> expected <identifier> expected <identifier> expected <identifier> expected <identifier> expected > okay here it is. > [quoted text clipped - 8 lines] > > --------------------Configuration: <Default>-------------------- Meaningless garbage snipped > Process completed. > ';' expected [quoted text clipped - 17 lines] > <identifier> expected > <identifier> expected <http://www.physci.org/codes/sscce.html> <http://mindprod.com/jgloss/sscce.html> SignatureLew > /* > MortgagePaymentCalculatorCR1.java [quoted text clipped - 6 lines] > //initialize numerical values > public static void main(String[] args) snip > '{' expected line 7 > '}' expected line 55 You've allowed yourself to be driven by the error messages without really understanding them. I found it a bad idea, as a beginner, to write 100 lines of java and then try compiling it. Start with this - does it compile? /* * MortgagePaymentCalculator.java */ public class MortgagePaymentCalculator { public static void main (String[] args) { System.out.println("Mortgage Payment Calculator"); } } A good way for a beginner to work is to not add any extra code to the above until it compiles. Then add no more than two or three lines. Get that to compile before proceeding. Proceed in tiny steps. If it compiles, what do you expect as output? Try running it and see if the actual output is as you expect. Don't add new functionality until the existing prototype behaves exactly how you expect. Use indentation to help you see the structure of the program. > You've allowed yourself to be driven by the error messages without > really understanding them. I found it a bad idea, as a beginner, to [quoted text clipped - 20 lines] > > Use indentation to help you see the structure of the program. What RedGrittyBrick is teaching you is also the way to put together an SSCCE. SignatureLew here is some generic advice: 1. use an IDE that formats your code. It makes bracketing errors much easier to see. See http://mindprod.com/jgloss/ide.html 2. look up error messages at http://mindprod.com/jgloss/errormessages.html -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com On Jun 12, 10:17 pm, Roedy Green <see_webs...@mindprod.com.invalid> wrote: > here is some generic advice: > [quoted text clipped - 5 lines] > Roedy Green Canadian Mind Products > The Java Glossaryhttp://mindprod.com thank you Roedy I will try these sites, this thing is kicking me around I'm about to pull my own hair. > thank you Roedy I will try these sites, this thing is kicking me > around I'm about to pull my own hair. You'll save yourself some hair if you provide SSCCEs with your questions, then people can actually help you. SignatureLew >You'll save yourself some hair if you provide SSCCEs with your questions, then >people can actually help you. see http://mindprod.com/jgloss/sscce.html -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com >> You'll save yourself some hair if you provide SSCCEs with your questions, then >> people can actually help you. [quoted text clipped - 4 lines] > The Java Glossary > http://mindprod.com As mentioned upthread, along with the physci.org link: <http://www.physci.org/codes/sscce.html> -- Lew > double MP; MP is declared here, but it never gets initialized. So when you use it, your program will explode (not literally) > double[] interestrate= new double[3]; > interestrate[0] = .0535; > interestrate[1] = .0550; > interestrate[2] = .0575; Just a small readability comment, you can have capitals in variable names. interestRate is easier to read, no? > for(int counter = 1; counter <=12; counter++); > { > //calculate Uh oh. See that semicolon? That's breaking your code. When you do a for loop in Java, there are two options for what follows: either a block noted by {}, or a single line that ends with ;. What you're doing here is telling Java "Do everything after for() but before ; 12 times," or, in your case, "Do nothing 12 times". As a result, in all of the code you have in the {} block below, i isn't initialized, and this code will only run once instead of 12 times, like you want. > PayMonthly = (loantotal * interestRate[i] / (1 - Math.pow(1/(1 + > interestRate[i]),loanlength[i]*12))); PayMonthly needs to be given a type the first time it's referenced. It looks like you've got two variables to do the same job (MP and PayMonthly) but if you only use each half of the time, neither gets the job done. Side note: general coding practice (at least in Java) is to name variables and methods with lowercase first, classes with proper case, and constants with all upper case. Hope that helps some. And people are right - it helps others help you if you're clear and specific about the problem you're having. Too little and people can't help, too much and there's garbage to sort through to find the problem. Good luck, Andrew > > double MP; > [quoted text clipped - 40 lines] > Good luck, > Andrew I would recommend going to your local library or book store and getting a book on Java. Either that, or read the Java Tutorials: http://java.sun.com/docs/books/tutorial/ >>> double MP; >> MP is declared here, but it never gets initialized. So when you use [quoted text clipped - 40 lines] > getting a book on Java. Either that, or read the Java Tutorials: > http://java.sun.com/docs/books/tutorial/ Like what I'm doing right now is alternating between "The Java Programming Language Fourth Edition" for basic stuff, and "Effective Java" for more advanced stuff. Both good books and both "From the Source" Another excellent book is Head First Java, part of the Head First Series published by O'Reilly. > >>> double MP; > >> MP is declared here, but it never gets initialized. So when you use [quoted text clipped - 49 lines] > > - Show quoted text - Thank you everyone, I really appreciate all of your help, I may not know how to ask the right question since I'm merely a begginer. >Thank you everyone, I really appreciate all of your help, I may not >know how to ask the right question since I'm merely a begginer. so was everyone else at one point. There is no shame in it. -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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