
java: cannot infer type for local variable myVar
If you get a Compile-Time Error "cannot infer type for local variable" in your Java code, then surely you are using JDK 10 or above and you are using var - local variable type inference in your program,
You will get the inferred type for local variable error when you declare a var local variable but do not initialize it. You need to make sure that you do declaration and initialize together,
Error prone code:package examples;
/**
*
* Code2care.org Java Programs
* Date: 7-Apr-2022
* Ver: v1.0
*
*/
public class VarExampleJava {
public static void main(String[] args) {
//some code
}
public void myMethod() {
var myVar; //CE: Cannot infer type: 'var' on variable without initializer
System.out.println(myVar);
}
}
Error:
/Users/c2c/java_11/src/examples/VarExampleJava.java:10:13
java: cannot infer type for local variable myVar
(cannot use 'var' on variable without initializer)
Solution:
As said before, you need to initialize the var variable,
public void myMethod() {
var myVar = "";
System.out.println(myVar);
}
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