Java Selenium Chromedriver.exe Does not Exist java.lang.IllegalStateException

Here is the error message I'm getting:

java.lang.IllegalStateException: The driver executable does not exist: C:\Users\sathe\eclipse-workspace\DataDrivenFramework\null\src\test\resources\executables\chromedriver.exe
    at com.google.common.base.Preconditions.checkState(Preconditions.java:585)
    at org.openqa.selenium.remote.service.DriverService.checkExecutable(DriverService.java:146)
    at org.openqa.selenium.remote.service.DriverService.findExecutable(DriverService.java:141)
    at org.openqa.selenium.chrome.ChromeDriverService.access$000(ChromeDriverService.java:35)
    at org.openqa.selenium.chrome.ChromeDriverService$Builder.findDefaultExecutable(ChromeDriverService.java:159)
    at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:355)
    at org.openqa.selenium.chrome.ChromeDriverService.createDefaultService(ChromeDriverService.java:94)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:123)
    at com.sat.base.TestBase.setUp(TestBase.java:73)

And here is the code I'm using

System.setProperty("webdriver.chrome.driver", System.getProperty("used.dir")+"\\src\\test\\resources\\executables\\chromedriver.exe");
driver = new ChromeDriver();

chromedriver.exe file is under one of the project workspace folder as below:

C:\Users\sathe\eclipse-workspace\DataDrivenFramework\src\test\resources\executables\chromedriver.exe

but in the exception I see the word 'null' is there between 'DataDrivenFramework' and 'src', dont know how it got there.

C:\Users\sathe\eclipse-workspace\DataDrivenFramework\null\src\test\resources\executables\chromedriver.exe