java Error while running class -

this question has answer here:

• what “could not find or load main class” mean? 35 answers

my directory structure this

/models/beamcalculate.java /lib/*.jar     ---------all jar files here. 

the beamcalculate.java --

package models; import com.fasterxml.jackson.databind.objectmapper;  public class beamcalculate{     private double width;     private double depth;     private double m;     private double mcap;  public static void main(string args[]){     objectmapper = new objectmapper(); }  } 

the thing gets compiled command --

javac -cp "lib/*" models/beamcalculate.java 

this generates beamcalculate.class file in models/

but when try run using command --

java -cp "lib/*" models/beamcalculate.class error -  error: not find or load main class models.beamcalculate.class 

what causing this?

you don't add .class suffix when run java command. shouldn't use / in full class name separate packages .. try

java -cp "lib/*" models.beamcalculate 

also may need add current location classpath maybe try adding .

java -cp ".;lib/*" models.beamcalculate 

or

java -cp ".:lib/*" models.beamcalculate 

depending on operation system.