The Daily Journal Co. reported third-quarter net income of $1.2 million (81 cents per share), double the $603,000 (41 cents) the company reported for the same period a year earlier. Revenues also jumped 9.6 percent to $9.2 million. The Los Angeles-based media company said the increase was due to a jump in public notice advertising sales and consulting revenues through its Sustain Technologies Inc. subsidiary, which supplies case management software systems to courts and other justice agencies. The company added that results were partly offset by decreased commercial advertising and circulation revenues. Shares in the Daily Journal were up $2.77, or 7 percent, to $42.75 in afternoon trading Tuesday on the Nasdaq.