JDK14/Java14源码在线阅读

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// Simple demo of Nashorn Parser API

var Parser = Java.type("jdk.nashorn.api.tree.Parser");
var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");
var IdentifierTree = Java.type("jdk.nashorn.api.tree.IdentifierTree");

var parser = Parser.create();
var ast = parser.parse("t", "eval('hello');\n  eval(2 + 3)", print);
// locate 'eval' calls in the script
ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) {
    lineMap: null,
    visitCompilationUnit: function(node, extra) {
        this.lineMap = node.lineMap;
        Java.super(visitor).visitCompilationUnit(node, extra);
    },

    visitFunctionCall: function(node, extra) {
       var func = node.functionSelect;

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