¿Cómo puedo mostrar en web3j una lista de todos los instructores agregados en mi cadena de bloques?

Necesito mostrar en un html una lista de todos los instructores que están configurados en la lista

pragma solidity ^0.4.18;

contract Owned {
address owner;

function Owned() public {
    owner = msg.sender;
}
modifier onlyOwner {
   require(msg.sender == owner);
   _;
 }
}

contract Courses is Owned {

struct Instructor {
    uint age;
    bytes16 fName;
    bytes16 lName;
}

mapping (address => Instructor) instructors;
address[] public instructorAccts;

event instructorInfo(
   bytes16 fName,
   bytes16 lName,
   uint age
);

function setInstructor(address _address, uint _age, bytes16 _fName, bytes16 _lName) onlyOwner public {
    var instructor = instructors[_address];

    instructor.age = _age;
    instructor.fName = _fName;
    instructor.lName = _lName;

    instructorAccts.push(_address)-1;
    instructorInfo(_fName, _lName, _age);
}

function getInstructors() view public returns(address[]) {
    return instructorAccts;
}

function getInstructor(address _address) view public returns (uint, bytes16, bytes16) {
    return (instructors[_address].age, instructors[_address].fName, instructors[_address].lName);
}

function countInstructors() view public returns (uint) {
    return instructorAccts.length;
}

}

ACTUALIZACIÓN: mi código web3js

  <script>
       if (typeof web3 !== 'undefined') {
    web3 = new Web3(web3.currentProvider);
} else {
    web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}

web3.eth.defaultAccount = web3.eth.accounts[1];

var CoursetroContract = web3.eth.contract([
{
    "constant": true,
    "inputs": [
        {
            "name": "_address",
            "type": "address"
        }
    ],
    "name": "getInstructor",
    "outputs": [
        {
            "name": "",
            "type": "uint256"
        },
        {
            "name": "",
            "type": "bytes16"
        },
        {
            "name": "",
            "type": "bytes16"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
},
{
    "constant": true,
    "inputs": [],
    "name": "getInstructors",
    "outputs": [
        {
            "name": "",
            "type": "address[]"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
},
{
    "constant": true,
    "inputs": [
        {
            "name": "_index",
            "type": "uint256"
        }
    ],
    "name": "getInstructorAtIndex",
    "outputs": [
        {
            "name": "",
            "type": "uint256"
        },
        {
            "name": "",
            "type": "bytes16"
        },
        {
            "name": "",
            "type": "bytes16"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
},
{
    "constant": true,
    "inputs": [
        {
            "name": "",
            "type": "uint256"
        }
    ],
    "name": "instructorAccts",
    "outputs": [
        {
            "name": "",
            "type": "address"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
},
{
    "constant": true,
    "inputs": [],
    "name": "countInstructors",
    "outputs": [
        {
            "name": "",
            "type": "uint256"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
},
{
    "constant": false,
    "inputs": [
        {
            "name": "_address",
            "type": "address"
        },
        {
            "name": "_age",
            "type": "uint256"
        },
        {
            "name": "_fName",
            "type": "bytes16"
        },
        {
            "name": "_lName",
            "type": "bytes16"
        }
    ],
    "name": "setInstructor",
    "outputs": [],
    "payable": false,
    "stateMutability": "nonpayable",
       "type": "function"
},
{
    "anonymous": false,
    "inputs": [
        {
            "indexed": false,
            "name": "fName",
            "type": "bytes16"
        },
        {
            "indexed": false,
            "name": "lName",
            "type": "bytes16"
        },
        {
            "indexed": false,
            "name": "age",
            "type": "uint256"
        }
    ],
    "name": "instructorInfo",
    "type": "event"
        }
     ]);

  var Coursetro = 
  CoursetroContract.at('0x13fd9e45bbd7ee860cdfc825839c9dfbd91a36cd');
  var instructorEvent = Coursetro.instructorInfo({}, 'EARLIEST');

instructorEvent.watch(function(error, result) {
    if (result) {
        if (result.blockHash != $("#insTrans").html())
             $("#loader").hide();
         $("#insTrans").html('Block hash: ' + result.blockHash);
        $("#instructor").html(web3.toAscii(result.args.fName) + ' ' + web3.toAscii(result.args.lName) + ' (' + result.args.age + ' Kb)');
    } else {
         $("#loader").hide();
    }
});

Coursetro.countInstructors((err, res) => {
    if (res)
     $("#countIns").html(res.c + ' number of files');
})

$("#button").click(function() {
     //$("#loader").show();
    Coursetro.setInstructor(web3.eth.defaultAccount, $("#age").val(), $("#fName").val(), $("#lName").val(), (err, res) => {
        if (err) {
            $("#loader").hide();
        }
    });
});