java - .method() without reference -


i've noticed following code compiler in program:

arraylist<token> eval = new arraylist<>(0); (token token : tokens) {     eval.add(token);     if (token.equals(new token("eos", "eos"))) {         .clear();     } else {         continue;     } }

but, part .clear() confuses me. should doing instance.method(), .method() works too! why this?

the snippet in question syntactically incorrect. following syntax applies method invocation expressions

method invocation

 - methodname ( [argumentlist] )  - typename . [typearguments] identifier ( [argumentlist] )  - expressionname . [typearguments] identifier ( [argumentlist] )  - primary . [typearguments] identifier ( [argumentlist] )  - super . [typearguments] identifier ( [argumentlist] )  - typename . super . [typearguments] identifier ( [argumentlist] )

in other words, can use identifier (name) of method, unqualified, context determine method , target reference (if has one). otherwise, you'll need expression or type name prefixes method identifier . character. again, there set of rules determine method being invoked, @ compile time , run time.

this part of code

.clear();

does not fit syntax defined above. is, if used literally in source, syntactically incorrect in java.

you might looking @ pseudo code or abridged form of language (within ide, example).


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