andreabergia

private class P {
}

public class MainClass {
}

andreabergia

digraph lexer {
    SumNode;
    NumberNode;
    1 [shape=doublecircle];
    FunctionCallNode;
    exp [shape=doublecircle];
    VariableNode;
    x [shape=doublecircle];
 
    VariableNode-> x [label=access];

andreabergia

digraph lexer {
    rankdir=LR;
    size="8,5";

    start [shape = doublecircle];
    number [shape = circle];
    operator [shape = circle];
    end [shape = doublecircle];

    start -> number [label=digit];