how to set a width of column in jtable code example

Example 1: datatable column width

columnDefs: [
            { width: 200, targets: 0 }
        ],

Example 2: datatable width column

table.display {
  margin: 0 auto;
  width: 100%;
  clear: both;
  border-collapse: collapse;
  table-layout: fixed;         // add this 
  word-wrap:break-word;        // add this 
}