Could you tell me how to use the anonymous class lambda expressions to rewrite?-CodePudding

I only know that interface can be rewritten so that how to use the lambda expressions of change?

 
Class A {
Public void (a) {
System. The out. Println (" hi "); 
} 
} 
Public class Test {
Public static void main (String [] args) {
A hello=new A () {
Public void (a) {
System. Out.println (" Hello!" ); 
} 
}; 
Hello. (a); 
} 
}

CodePudding user response:

What this class is so easy to transform, you again with no flow

CodePudding user response:

reference 1st floor KeepSayingNo response:

what this class is so simple to transform, you again in less than flow

Is a exercises... But don't know how to change the subclass

CodePudding user response:

Lambda is functional interface, A is A class class, you can't rewrite, if you are A is an interface, and there is only one method is not A ()

 
Interface A {
Void (a); 
}

So that you can rewrite into using lambda

 
A=A () - & gt; System. Out.println (" Hello!" );