Java.Lang.Nosuchmethoderror: Principal Exception Inwards Thread Main
How to solve java.lang.NoSuchMethodError: principal Exception inwards thread "main"
java.lang.NoSucMethodError comes when Java code tries to call a method which is non existed on a class, this could hold upwards either static or non static method. most mutual manifestation of java.lang.NoSuchMethodError is running a course of written report which doesn't accept main method inwards Java. In this article nosotros volition meet what is "java.lang.NoSuchMethodError: principal Exception inwards thread "main"" , Why does java.lang.NoSuchMethodError comes in addition to how to solve java.lang.NoSuchMethodError inwards Java.
What is "java.lang.NoSuchMethodError: principal Exception inwards thread "main""
This is a manifestation of NoSuchMethodError inwards Java in addition to complaining almost "main" which is cite of method JVM tries to telephone phone simply doesn't detect inwards offending class. "java.lang.NoSuchMethodError: principal Exception inwards thread "main" tin come upwards due to diverse reasons like: 1) Class which yous are trying to run doesn't accept principal method.
2) Signature of principal method is non right . See hither for all possible signature of principal method inwards Java.
Example of "java.lang.NoSuchMethodError: principal Exception inwards thread "main"
To ameliorate empathize NoSuchMethodError in Java let's meet closed to mutual examples of java.lang.NoSuchMethodError and detect out how in addition to when they come:
1) endeavor to run a coffee course of written report which doesn't accept a principal method:
public class Loan{
public String getPersonalLoan(){
return "Personal Loan";
};
}
public String getPersonalLoan(){
return "Personal Loan";
};
}
2) Now compile this course of written report it should compile without whatever error:
user@home: /java javac Loan.java
3) Run as "java Loan"
user@home: /java coffee Loan
java.lang.NoSuchMethodError: main
Exception inwards thread "main"
java.lang.NoSuchMethodError: main
Exception inwards thread "main"
There are really few scenarios on which java.lang.NoSuchMethodError come upwards during runtime because compiler is able to banking concern jibe this fault in addition to flag it if doesn't flora the proper method except principal which is optional method in addition to solely checked yesteryear JVM during runtime. As I said before Another possible effort of "java.lang.NoSuchMethodError: principal Exception inwards thread "main" is that yous accept principal method inwards course of written report simply signature of principal method is non correct. to evidence this scenario let's
add a principal method inwards Loan.java
public course of written report Loan{
populace String getPersonalLoan(){
furnish "Personal Loan";
};
populace static void main(String args){
System.out.println("Inside principal inwards Java");
}
}
populace String getPersonalLoan(){
furnish "Personal Loan";
};
populace static void main(String args){
System.out.println("Inside principal inwards Java");
}
}
Now compile in addition to run this Java program. You volition even in addition to then get:
java.lang.NoSuchMethodError: principal Exception inwards thread "main"
because inwards main method args should hold upwards string array in addition to nosotros accept non added [] in that place in addition to that's why this error.
That’s all on How to fix java.lang.NoSuchMethodError: principal Exception inwards thread "main . Ideally java.lang.NoSuchMethodError comes when nosotros telephone phone a method which doesn’t exits inwards course of written report simply generally typo, wrong declaration or wrong signature turns out to hold upwards existent culprit.
Further Learning
Complete Java Masterclass
How to attain ClassNotFoundException inwards Java
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