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Bug 238837

Summary: [Change method parameter] Show waring if changing parameters in functional interface
Product: java Reporter: Jiri Prox <jiriprox>
Component: RefactoringAssignee: Ralph Ruijs <ralphbenjamin>
Status: NEW ---    
Severity: normal    
Priority: P3    
Version: 8.0   
Hardware: PC   
OS: Windows 7   
Issue Type: ENHANCEMENT Exception Reporter:

Description Jiri Prox 2013-11-26 15:55:22 UTC 
Changing parameters of method in functional interface may break the code if the interface is used as parameter of another method and a method reference is passed instead of instance.

Example:
    interface FIface {    
        boolean test(int a);
    }
                    
    public boolean anotherMethod(int x) {
        return true;
    }
    
    public void use() {
        method(this::anotherMethod);                
    }
    
    public void method(FIface in) {        
    }


adding parameter to method FIface.test() breaks line method(this::anotherMethod); 


Product Version: NetBeans IDE Dev (Build 20131125-d473cd33358e)
Java: 1.8.0-ea; Java HotSpot(TM) 64-Bit Server VM 25.0-b49
Runtime: Java(TM) SE Runtime Environment 1.8.0-ea-b107
System: Windows 7 version 6.1 running on amd64; Cp1250; en_US (nb)
User directory: C:\Users\jprox\AppData\Roaming\NetBeans\dev
Cache directory: C:\Users\jprox\AppData\Local\NetBeans\Cache\dev