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1、java方法大全（JavamethodDaquan）JavacommonmethodsDaquanCharacterstring1.GetthelengthofastringLength()2.DeterminewhethertheprefixorsuffixofastringisthesameasaknownstringPrefixstartsWith(Strings)SuffixendsWith(Strings)3.ComparetwostringsEquals(Strings)4.Convertthestringtothecorrespondingnum
2、ericvalueIntInteger.parseInt(string)LongLong.parseLong(string)FloattypeFolat.valueOf(string).FloatValue()DoubletypeDouble.valueOf(string).DoubleValue()4.ConvertnumericvaluestostringsValueOf(numerical)5,stringsearchIndexOf(Srtings)retrievalfromscratchIndexOf(Strings,intstartpoint)ret
3、rievesfromstartpointIfnotretrieved,-1willbereturned6.GetthesubstringofastringSubstring(intstartpoint)startsfromstartpointCharactersinsubstring(intstart,intend)fromstarttoend7,replacethestringcharacter,removethestringbeforeandafterthespaceReplace(charold,charnew)replacesoldwithnew(tr
4、im)8.StringanalysisStringTokenizer(Strings)constructsaparserthatusesdefaultdelimitedcharacters(spaces,newline,carriagereturns,Tab,feedcharacters)StringTokenizer(Strings,Stringdelim)delimisadelimiterdefinedbyitselfNextToken()getsthelanguagesymbolsinastringonebyoneBooleanhasMoreTokens
5、()returnstrueaslongasthestringhasalanguagesymbol,otherwisefalseisreturnedHowmanylanguagesymbolsarethereincountTokens?Textboxandtextarea1,textboxTextField()constructsatextbox,onecharacterlongTextField(intx)constructsatextbox,XcharacterslongTextField(Strings)constructsatextboxanddispl
6、ayssSetText(Strings)setsthetexttosGetText()getstextSetEchoChar(charc)setsthedisplaycharactertoCSetEditable(Boolean)setswhetherthetextboxcanbemodifiedAddActionListener()addmonitorRemoveActionListener()removemonitor2,textareaTextArea()constructsthetextareaTextArea(Strings)constructsth
7、etextareaanddisplayssTextArea(Strings,intx,inty)constructstextfields,Xrows,ycolumns,anddisplayssTextArea(intx,inty)constructstextfields,Xrows,andYcolumnsTextArea(Strings,intx,ingy,intscrollbar)Thevalueofscrollbaris:TextArea.SCROLLBARS_BOTHTextArea.SCROLLBARS_VERTICAL_ONLYTextArea.SC
8、ROLLBARS_HORIZONTAL
