java - Jcreator 中的奇怪输出

Question

嗨，我正在为学校布置一份作业，并从中得到一个非常奇怪的输出。程序编译得很好，但我检查了它给我的输出:

--------------------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:
-d32      use a 32-bit data model if available
-d64      use a 64-bit data model if available
-server   to select the "server" VM
-hotspot      is a synonym for the "server" VM  [deprecated]
              The default VM is server.

-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
-version:<value>
              require the specified version to run
-showversion  print product version and continue
-jre-restrict-search | -no-jre-restrict-search
              include/exclude user private JREs in the version search
-? -help      print this help message
-X            print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
              enable assertions with specified granularity
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
              disable assertions with specified granularity
-esa | -enablesystemassertions
              enable system assertions
-dsa | -disablesystemassertions
              disable system assertions
-agentlib:<libname>[=<options>]
              load native agent library <libname>, e.g. -agentlib:hprof
              see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
              load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
              load Java programming language agent, see java.lang.instrument
-splash:<imagepath>
              show splash screen with specified image
See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more          details.

Process completed.

我不确定我在这里做错了什么，因为我的 friend 和我自己看起来都很好。

源代码(请记住该程序尚未完成)在这里:

/*
Assigone113.java Assignment
Written By Some Guy
*/

import java.util.Scanner;
public class AssigOne113
{
public static void main (String[]args)
{
    //Final variables//
    final int CURRYR=2013;
    final int SNKYR=2013 /* | 2001 | 1989 | 1977 | 1965 | 1953 | 1941 | 1929 |  1917 | 1905 | 1893 | 1881 | 1869 | 1857 | 1845 |
                    1833 | 1821 | 1809 | 1797 | 1785 | 1773 | 1761 | 1749 | 1737 | 1725 | 1713 | 1701 | 1689 | 1677 | 1665 |
                    1653 | 1641 | 1629 | 1617 | 1605 | 1593 | 1581 | 1569 | 1557 | 1545 | 1533 | 1521 | 1509 | 1497 | 1485 |
                    1473 | 1461 | 1449 | 1437 | 1425 | 1413 | 1401 | 1389 | 1377 | 1365 | 1353 | 1341 | 1329 | 1317 | 1305 |
                    1293 | 1281 | 1269 | 1257 | 1245 | 1233 | 1221 | 1209 | 1197 | 1185 | 1173 | 1161 | 1149 | 1137 | 1125 |
                    1113 | 1101 | 1089 | 1077 | 1065 | 1053 | 1041 | 1029 | 1017 | 1005 | 993 | 981 | 969 | 957 | 945 | 933|
                    921 | 909 | 897 | 885 | 873 | 861 | 849 | 837 | 825 | 813 | 801 | 789 | 777 | 765 | 753 | 741 | 729 | 717|
                    705 | 693 | 681 | 669 | 657 | 645 | 633 | 621 | 609 | 597 | 585 | 573 | 561 | 549 | 537 | 525 | 513 | 501|
                    489 | 477 | 465 | 453 | 441 | 429 | 417 | 405 | 393 | 381 | 369 | 357 | 345 | 333 | 321 | 309 | 297 | 285|
                    273 | 261 | 249 | 237 | 225 | 213 | 201 | 189 | 177 | 165 | 153 | 141 | 129 | 117 | 105 | 93 | 81 | 69 | 57|
                    45 | 33 | 21 | 9 | 2025 | 2037 | 2049 | 2061 | 2073 | 2085 | 2097 | 2109 | 2121 | 2133 | 2145 | 2157 |
                    2169 | 2181 | 2193 | 2205 | 2217 | 2229 | 2241 | 2253 | 2265 | 2277 | 2289 | 2301 | 2313 | 2325 | 2337 |
                    2349 | 2361 | 2373 | 2385
                    */;
        //Variables//

        Scanner keyboard;
        Scanner birthday;
        Scanner birthyear;

        String progstart;
        String Uname;
        String restartprog;
        String season = "springtime";
        String DD;

        double DDMM;

        int Essscore=0;
        int year;
        int month;
        int day;

        char Yeschar;

        boolean loopstart;

        //SAMMY SNAKES SIXTH/SEVENTH SPRING OF SUCCESS START//
        System.out.println(" ");
        System.out.println("<------------------------------------------->");
        System.out.println("Sammy Snakes Sixth/Seventh Spring Of Success");
        System.out.println("<------------------------------------------->");
        System.out.println(" ");

        //ASK FOR USAGE INPUT//
        System.out.println("I can calculate an Ess-Score for you"); 
        System.out.println("Would you like to calculate an Ess-Score?");
        keyboard=new Scanner(System.in);
        progstart=keyboard.next();
        Yeschar=(progstart.charAt(0));

        if (Yeschar=='y')

            {
                loopstart=true;
            }   

            else
                {
                loopstart=false;
                }
        while (loopstart==true);

        //USER NAME INPUT//
        System.out.println("To begin, what is your name?");
        keyboard = new Scanner(System.in);
        Uname = keyboard.next();
        if (Uname.charAt(0)== 'S');


}       

 }

对此的任何帮助将不胜感激，

谢谢

Answer 1

如果主类配置不正确，就会出现此问题，请修复它

转到“项目”->“项目设置”->在“运行”组合框中选择您的主类，然后单击“确定”。

如果项目设置呈灰色，则意味着您正在以独立模式创建文件，并且无法选择主类，因此您必须创建一个新项目。

顺便说一句，JCreator对于java开发来说并不是一个好的IDE，而且有很多bug。它不是开源的。在某个时候切换到 Netbeans 的 Eclipse 或 intellij Idea 社区版，您永远不会后悔。