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 errorWhy 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);
}
}
-
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