<!DOCTYPE html>
<html>
<body>

<h2>Adding Column To A Row</h2>
<table border="1" id="tbl">
<tr id="1">
    <th>Email_id</th>
    <th>User_data</th>
</tr>
<tr id="2">
    <td>[email protected]</td>
    <td>Software Developer</td>
</tr>
<tr id="3">
    <td>[email protected]</td>
    <td>Intern</td>
</tr>
</table>
<button onclick="add()">Add</button>
<script>
function add(){
    var row = document.getElementById("1"); 
    var col = document.createElement("td");
    col.innerText="New_title";
    row.appendChild(col);
  }
</script>
</body>
</html>

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Java