hook_overloads.js

function hookOverloads(className, func) {
    var clazz = Java.use(className);
    var overloads = clazz[func].overloads;
    for (var i in overloads) {
      if (overloads[i].hasOwnProperty('argumentTypes') || overloads[i]['argumentTypes'] != undefined) {
        var parameters = [];
  
        var curArgumentTypes = overloads[i].argumentTypes, args = [], argLog = '[';
        for (var j in curArgumentTypes) {
          var cName = curArgumentTypes[j].className;
          parameters.push(cName);
          argLog += "'(" + cName + ") ' + v" + j + ",";
          args.push('v' + j);
        }
        argLog += ']';
  
        var script = "var ret = this." + func + '(' + args.join(',') + ") || '';\n"
          + "console.log(JSON.stringify(" + argLog + "));\n"
          + "return ret;"
  
        args.push(script);
        clazz[func].overload.apply(this, parameters).implementation = Function.apply(null, args);
      }
    }
  }
  
  Java.perform(function() {
    hookOverloads('java.lang.StringBuilder', '$init');
  })