java课堂笔记（java课堂笔记）

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1、java课堂笔记（java课堂笔记）Monday:towardstheabyss;Tuesday:endlessroad;Wednesday:beforedawn;Thursday:lifeanddeathstruggle;Friday:thedarknessbeforedawn;Saturday:escapefromthetiger'sjaws;Sunday:happybachelor;Diploma/Diplomaexamination/selfexaminationoffice/computerappli

2、cation,computernetwork,electroniccommerceOneIndicatestartingfromthisdirectory;Donotadd"No."tothe2.ifstatement!Thefollowing:ifif(I==stop)break,withasemicolon(i.e.If(I==stop);break;thenthecompilererror,butnotcheckout,payattentionto;3.continuestatementusage:Int

3、skip=5;For(inti=1;I<5;i++){If(I==skip)continue;System.out.println("i="+I);}Theuseof4.forstatements,suchas:For(inti=0;I5;i++){...};Payattentiontothesemicolon!!!Theexecutionprocess:firstcalculatetheexpression,andthenjudgetheexpression2,thenexecutethemethodstat

4、ement,andthenexecuteexpression3,andthenjudgetheexpression2,andthenexecutethemethod......Bythiscycle.(theexpressioniscalculatedonce.)5.whilestatementform:While(logicalexpression){statement}Executionprocess:Firstdeterminethevalueofthelogicalexpression.If=true.

5、,thenthestatementbehindtheexecutor,andthenagainjudgetheconditionsandrepeatedexecutionuntiltheconditionisuntenable.6.whiledostatement:Do{statement:......}while(logicalexpression);Executionprocess:Firstexecutethestatement,thenjudgethevalueofthelogicalexpressio

6、n,iftrue,thenexecutethestatement,otherwisetheendofthecycle.7.comparewhile,if,for;whileandforarecyclictypes;ifisaone-timestatement.8.switch(I)meansthatthevalueofIisdetected;thevalueofIcanonlybeofinttype(includingautomaticallyconvertedtointtype,suchasChrshirtb

7、ate;examples):PublicclassTestswitch{Publicstaticvoidmain(Stringargs[]){Inti=3;Switch(I){Case8:System.out.println("A");Break;Case4:System.out.println("B");Break;Case5:System.out.println("C");Break;Default:System.out.println("Error");Break;}}}Executionresults:

8、print"error";becarefulofcasepenetration.Casemeanswhenthishappens;9.methodsThemethodofJavaissimilartothefunctionofotherlanguages.Itisasnippetofcodethathascompletedthelisteningfunction.Formatdecla