java api 接口篇（二)上

　　 在一台老式UltraSparc 1上运行一个有80,000个单词的词典用了大约16秒；最小排列组尺寸为8 。它生成了下列输出 　

　　% java Perm dictionary.txt 8
9: [estrin, inerts, insert, inters, niters, nitres, sinter,
triens, trines]
8: [carets, cartes, caster, caters, crates, reacts, recast, traces]
9: [capers, crapes, escarp, pacers, parsec, recaps, scrape, secpar,
spacer]
8: [ates, east, eats, etas, sate, seat, seta, teas]
12: [apers, apres, asper, pares, parse, pears, prase, presa, rapes,
reaps, spare, spear]
9: [anestri, antsier, nastier, ratines, retains, retinas, retsina,
stainer, stearin]
10: [least, setal, slate, stale, steal, stela, taels, tales, teals,
tesla]
8: [arles, earls, lares, laser, lears, rales, reals, seral]
8: [lapse, leaps, pales, peals, pleas, salep, sepal, spale]
8: [aspers, parses, passer, prases, repass, spares, sparse, spears]
8: [earings, erasing, gainers, reagins, regains, reginas, searing,
seringa]
11: [alerts, alters, artels, estral, laster, ratels, salter, slater,
staler, stelar, talers]
9: [palest, palets, pastel, petals, plates, pleats, septal, staple,
tepals]
8: [enters, nester, renest, rentes, resent, tenser, ternes, treens]
8: [peris, piers, pries, prise, ripes, speir, spier, spire]　

　　对象排序 　

　　一个 List l 可能被做如下排序: