How do I solve the problem of "java.lang​.NullPoint​erExceptio​n" in MATLAB?

4 次查看（过去 30 天）
Al Mamun
Al Mamun 2017-12-18
I am using MATLAB 2017a. Here is my Java Code
public class HelloWorld {
public static void main( String args[] )
{
System.out.println( "Hello World:" );
if (args.length >0){
System.out.println( args[0] );
}
}
public int f1 (String args[]){
if (args.length >0){
System.out.println( args[0] );
}
return 121;
}
}
First I create an object in MATLAB
o=HelloWorld
Then I run the bellow method for seeing Output.
javaMethod('main',o,'')
This code runs but gives an error.
Hello World:
Java exception occurred:
java.lang.NullPointerException
at HelloWorld.main(HelloWorld.java:5)
How do I solve this problem?

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