"A frightening number of companies I would never consider talking about are now on my radar," Jim Cramer said Tuesday on his "RealMoney" radio show.

Cramer said energy plays that historically have been very risky "are going to work in an environment where oil is much higher than anybody thought it would be."

He mentioned Capstone Turbine ( CPST - Get Report), Syntroleum ( SYNM), Rentech ( RTK) and Distributed Energy Systems ( DESC - Get Report).

Cramer said solar plays such as Evergreen Solar , which has some potential in Europe, and Cypress Semiconductor ( CY), which has a "nifty" solar business that is about to be spun off, have a chance to do well.

Cramer also mentioned "wild" natural gas play Chesapeake Energy ( CHK), oil service companies such as Schlumberger ( SLB - Get Report), oil rig manufacturers like National Oilwell Varco ( NOV - Get Report) and rig leasing companies such as Transocean ( RIG - Get Report) and Grey Wolf . The safest energy plays now are the ones that used to be the most dangerous, said Cramer.

Tuesday's Danger Zone stock was Abercrombie & Fitch ( ANF - Get Report). Cramer said apparel retailers are suffering from too much denim, a not-so-great back-to-school season and high oil prices. Cramer is especially worried about Abercrombie & Fitch after the company announced Monday its president would leave the company after just 15 months.

"There's something wrong, but I don't know what it is." There's no reason to be in the stock until you find out more, said Cramer. He recommends selling ANF on a bounce.

Cramer was also bearish on Delphi . He believes the company won't be able to restructure its debt satisfactorily.

A caller asked about San Juan Basin Royalty Trust ( SJT - Get Report). Cramer recommended taking some profits and letting the rest run. An emailer asked about RITA Medical Systems Cramer recommended selling the stock upon the company's mid-September launch of its newly approved surgical device.

An emailer asked about St. Jude Medical ( STJ). Cramer said St. Jude was a very good stock to own in this environment as it is not economically sensitive and has excellent products.

Cramer was not positive on Boston Scientific ( BSX) but wants to be in Zimmer Holdings ( ZMH). It is "part of my baby-boom thesis," he said. Cramer believes Zimmer will come out OK in the Department of Justice's investigation of the orthopedics industry.

In response to an email question about Strkyer ( SYK), Cramer said he liked Zimmer, Diomed ( DIO) and Mentor better. "But, that doesn't mean Stryker is bad."

Cramer was bullish on Adams Respiratory Therapeutics due to its Mucinex expectorant drug. ARXT is a company that "doesn't need the economy," said Cramer.

A caller asked about computer hard disk film maker Komag . Komag's stock has fallen to about $33.50 from $40.50 in the last 10 days. Cramer said the market is worried that flash memory will replace disk drives. Cramer believes Komag is in for a "couple more days of pain." By the first week of September, you can get back into disk drive stocks, said Cramer.

James J. Cramer is a director and co-founder of TheStreet.com. He contributes daily market commentary for TheStreet.com's sites and serves as an adviser to the company's CEO. Outside contributing columnists for TheStreet.com and RealMoney.com, including Cramer, may, from time to time, write about stocks in which they have a position. In such cases, appropriate disclosure is made. To see his personal portfolio and find out what trades Cramer will make before he makes them, sign up for Action Alerts PLUS. While he cannot provide personalized investment advice or recommendations, he invites you to send comments on his column by clicking here. Listen to Cramer's RealMoney Radio show on your computer; just click here. Watch Cramer on "Mad Money" at 6 p.m. ET weeknights on CNBC. Click here to order Cramer's latest book, "Real Money: Sane Investing in an Insane World," click here to get his second book, "You Got Screwed!" and click here to order Cramer's autobiography, "Confessions of a Street Addict."