Oihana mua o Iawa mea kükohu: he Hōʻuluʻulu papa, he mau '

Ke kiʻi i ka manaʻo o ka Hōʻuluʻulu papa ua hookomoia ma ka hahai theses: kekahi manawa pono ole imu paahana, a ma "pulu" palapala. Na laina i hiki ole ke pololei hoʻohana (instantiate).

He aha mea he Hōʻuluʻulu papa ma ka Iawa

kekahi kumu noonoo. Aia He He Iawa Hōʻuluʻulu papa Alemanaka ma Java.util AEeAaOA. Ua 'Aʻole e hoʻokō i kekahi mau lā' alemanaka, i ua ia, no ka laʻana, ma ka Western a me ka hikinaʻEulopa, China, North Korea, Thailand, etc. Akā, ka mea, aole i na mea he nui pono keia mau hiʻona, e like me ohui i kekahi mau lā a hiki i kekahi mau 'lā: .. i koi' ia kēia mau hana no kekahi lā 'alemanaka mai o ka manaʻo. He mea hiki ole i ka paka i ke kope o ka Hōʻuluʻulu papa.

Hōʻuluʻulu papa, Hōʻuluʻulu Iawa ki ina hana like

Ina oe makemake e hoʻoikaika mau mea kiʻi hehee wale, e laʻa me, geometric kinona: .. A a puni, rectangle, hoku, etc. A aia no he ipu a ua kokoke mai ia. Kēlā me ke keʻena o ka helehelena mea okoa, no laila, ua hoʻokō okoa ka kūpono iaoia (a hiki ina mea ua kapaia HW). Eia naʻe, kēlā ke keʻena he nui kona mea like: .. ka huahelu E e komo i loko o ka pahu i i ke kala no e nanaia a me kaʻike makaʻole, etc. Ma kekahi olelo, e pono e ho okumu i ka makua papa no nā mea a pau o kēia mau huahelu, ma kēlā me kēia ke keʻena, e ili mai ka mau waiwai. Akā, mea e pili ana i ka HW hana? Ma hope o nā mea a pau, i ka makua papa mea i pilikia makapō e hoohalike ai. Inā e hai aku i ka HW ano i loko o kēlā me kēia papa kū kaʻawale, ka mea e e pono e kālailai i ke keʻena ua hoʻokō 'ia, a laila, hana i ka nou ana la o. No laila, pono e hai aku Hōʻuluʻulu i loko o ka makua papa i ka papa hana: ka iaoia i ka inoa me ka kino. A kino o kela a me keia loko ka papa e wehewehe i kona iho. Ma Iawa, he Hōʻuluʻulu papa ke komo i ka Hōʻuluʻulu ki ina hana like.

Inā he papa i Hōʻuluʻulu ki ina hana like, i ke kūlana mea Hōʻuluʻulu. Ma mua o ka hua'ōlelo papa i ke koho hua'ōlelo Hōʻuluʻulu, i ka inoa o ka iaoia - pū. Ma hope o ka inoa o ia i ka papa hana mea e pono ke waiho i ka semicolon. Ma Iawa, he Hōʻuluʻulu papa hiki ole paka kope. Inā mākou makemake e Ban i ko lakou hanaia'na, a ina he mea ole Hōʻuluʻulu ano o ka papa, i ka papa hiki ke haiia'ku Hōʻuluʻulu. Akā, inā i ka papa i ma ka liʻiliʻi loa hoʻokahi Hōʻuluʻulu iaoia, pono e Hōʻuluʻulu ka papa. He mea hiki ole i ka papa ua a me ka Hōʻuluʻulu mea, a me ka hope, a me ka iaoiaeii pū. Ka papa hana hiki ole e Hōʻuluʻulu, malū, kūpaʻa, kanaka maoli. No subclass kekahi ke hai ole-Hōʻuluʻulu a instantiate, ka mea, e hoʻokō i nā mea a pau Hōʻuluʻulu ano o ka makua. Ke papa ia e kona Hōʻuluʻulu ano hana.

Eia kekahi laʻana:

• Hōʻuluʻulu papa AClass,
• lehulehu Hōʻuluʻulu mea ole iaoia (INT he) ;
• }
• papa BClass kŰlń ao AClass,
• lehulehu ole iaoia (INT kekahi),
• // kino
• }

Ae aiaiiuo e like me Hōʻuluʻulu papa. Ka mea, keʻano i ka pili-Hōʻuluʻulu keiki o ua papa paha e Yard.

Interfaces ma Iawa - i kekahi koho i mau hooilina

Ma Iawa, aole hoi he mau hooilina, no ka mea, a laila, loaʻa nō kekahi mau pilikia. A papa hiki ole ke loaa mai kekahi mau papa. Akā,ʻo ia ke hoʻokō i mau Library.

Iawa Library a Hōʻuluʻulu papa - ka manaÿo e like, akā,ʻaʻole'ālike. Ke mau 'hiki ke hai aku i ka lehulehu, a laila ka mea, ua loaʻa i ka mea a pau, a me' oe ke omit ka modifier lehulehu, alaila, ke mau 'mea loaʻa wale nō i loko o kona AEeAaOA. Hōʻuluʻulu koho hua'ōlelo ua i koi 'ia, no ka mea, ke mau' a pela mea Hōʻuluʻulu, akā, e hiki ke koho 'ia.

An mau 'hoakaka

Ua hoʻomaka me ka :, EeIeOIeOIeAa, a e hele mua ana i ka hua'ōlelo lehulehu, laila - hua'ōlelo mau '. A laila, aole e hiki ia i ka hua'ōlelo kŰlń ao a me ka wehe 'ia' Interfaces, mai i ili mai iā ia i kēia. Ua ua i 'ae' ia 'oe, a he mea hiki ole ke hana i ka cyclic lākiō o ka hooilina pili. A laila, hiki mai ka mau 'kino, puni iho la ka ia ma curly koo aku. Ma ke kino o ka mau 'hehee wale i hai aku ai: Field ia a eia i a me Hōʻuluʻulu ki ina hana like. All mahinaʻai i lehulehu hope kūpaʻa - a pau o kēia mau modifiers mea i pono. A pau i nā kiʻina hana i manaoia e e lehulehu Hōʻuluʻulu - i hiki ke hoakaka ia mau modifiers. Ano, lawa ua olelo mai e pili ana i ka likeʻole ma waena o ka Hōʻuluʻulu papa, mai ka Iawa mau '.

• lehulehu mau 'AI kŰlń ao B, C, D,
• // kino
• }

E hai aku i ka papa mau 'hooilina, pono e hoʻohana i ka hua'ōlelo lako:

• papa AClass mea lapaʻauʻelua, CI, DI {}

Ia mea, inā ma hope o ka papa hoike ana'ku e kakau mai ke koho 'ia mau' inoa, kona kūlana mea lapaʻau. Poe hooilina o keia ano i loaʻa kona oihana mua, no laila, e kuai lilo aku no hoi lakou ia ia.

Aiaiiuo o kekahi mau 'type ua hoi ae. Ka mea, keʻano i ke 'ano o ka papa e kakau mai i kēia mau', a Yard. Oia aiaiiuo i i na oihana mua o ke kiʻi ka papa, no ka mea, e ua loaʻa i nā mea ma ka papa, a me ka mea, ma ka huli, loaa mai ka mea papa.

Ma keia 'atikala, ua ana no kekahi mau oihana mua o Iawa mea kükohu - Hōʻuluʻulu papa, Hōʻuluʻulu ano mau'.