Tus applet yog qhov program me sau ua Java uas tau ntxiv rau nplooj ntawv web thiab tua ncaj qha rau hauv qhov browser siv lub tshuab Java. Cov ntawv thov siv tau los tsim kev sib tham sib ntsib ntawm lub xaib uas tsis tuaj yeem tsim hauv HTML. Lub applet code ua haujlwm ntawm nws tus kheej ntawm lub platform, yog li lawv tuaj yeem ua haujlwm los ntawm cov browsers ntawm cov kev ua haujlwm sib txawv.
Tsim nyog
Ib puag ncig Java programming
Cov Lus Qhia
Kauj ruam 1
Tsim qhov project tshiab hauv koj qhov chaw khaws Java. Cov ntaub ntawv uas yuav tsum tau khiav cov applet muaj.java thiab.class txuas ntxiv, tab sis NetBeans muaj peev xwm cia li tsim cov ntawv HTML. Nws yog ntshaw tias txhua cov ntaub ntawv nyob hauv tib lub npe.
Kauj ruam 2
Tsim koj thawj zaug FirstProgram applet:
ntshuam java.awt. *
ntshuam applet.awt. *
chav kawm pej xeem FirstProgram txuas rau Applet {
pej xeem tsis muaj dabtsis mob (Graphics dr) {
dr.drawString ("Nov yog kuv thawj Java applet", 20, 20);.}}
Kauj ruam 3
Cov lus qhia tseem ceeb yog lub luag haujlwm rau kev npaj cov chav npaj tau muaj nyob hauv chav tshwj xeeb Lib. Hauv qhov no, java.awt thiab applet.awt suav nrog, tab sis kev siv qee lub tsev qiv ntawv nyob ntawm lub cuab yeej siv hauv qhov program. Ntshuam java.awt suav nrog chav qhia Graphics, uas yog tus saib xyuas cov duab thiab cua haujlwm. Cov applet.awt chav kawm import cov ntaub ntawv rau kev ua haujlwm nrog applets.
Kauj ruam 4
Tom ntej no, chav kawm tshiab, FirstProgram, yog tsim, uas yog ncua siv qhov txuas ntwm ntsuas. Qhov kev thov tsim tawm yuav suav tag nrho cov hau kev thiab cov ntaub ntawv los ntawm Applet, i.e. FirstProgram txais txhua yam tsis tau.
Kauj ruam 5
Pej xeem pab tso tawm cov applet no los ntawm qhov browser. Yog tias koj tau teev tus nqi mus rau Tus Kheej, ces koj yuav tsis muaj peev xwm khiav qhov kev pab cuam los ntawm sab nraud.
Kauj Ruam 6
Txheeb rau cov txiaj ntsig tau los ntawm siv qhov hais kom tsim nyog hauv koj qhov chaw sau cia. Hauv NetBeans, mus rau chav kawm tseem ceeb ntawm koj lub applet (FirstProgram.class) thiab txoj nyem. Xaiv lub Run menu. Tom qab kev tswj hwm txoj haujlwm, cov ntaub ntawv sau ua ke html yuav tshwm nyob rau hauv phau ntawv tsim tsa ntawm qhov project.
Kauj Ruam 7
Nrog html, applets muaj nyob ntawm tus sau piav qhia. Hauv nws koj tuaj yeem tsim qhov kev txwv qhov dav, qhov siab. Piv txwv li:
