Fix: error: non-static type variable T cannot be referenced from a static context

Sample code:

1. package org.code2care.generics;
2. 
3. public class Sample<T> {
4. 
5.    public static void main(String... args) {
6.        T obj;
7.    }
8. }

Now when you complete this code using javac you get the below compliation error.

% Sample.java:6: error: non-static type variable T cannot be referenced from a static context
	   		T obj;
	   		^
1 error

Why this error?

The issue occurs at line number 6 because we are trying to declare a generic T type parameter which is of non-static type inside the main method which is of static type.

Fix:

One of the solutions to this issue can be that you can create a non-static method and then make use of the T type parameter.

package org.code2care.generics;

public class Sample<T> {

    public void nonStaticMethod(T t) {
        System.out.println(t);
    }

    public static void main(String[] args) {
        System.out.println(10);
    }
}