Debug.js

// Get list of loaded Java classes and methods

// Filename: java_class_listing.js

Java.perform(function() {
    Java.enumerateLoadedClasses({
        onMatch: function(className) {
            console.log(className);
            describeJavaClass(className);
        },
        onComplete: function() {}
    });
});

// Get the methods and fields
function describeJavaClass(className) {
  var jClass = Java.use(className);
  console.log(JSON.stringify({
    _name: className,
    _methods: Object.getOwnPropertyNames(jClass.__proto__).filter(function(m) {
      return !m.startsWith('$') // filter out Frida related special properties
        || m == 'class' || m == 'constructor' // optional
    }),
    _fields: jClass.class.getFields().map(function(f) {
      return( f.toString());
    })
  }, null, 2));
}