String code example

 PackageLianxi; Public classlianxi0112 { Public Static voidMain (string[] args) {//TODO Auto-generated method stubsString str= "string constant"; String str1=NewString ("string"); CharA[]={' A ', ' B ', ' C ', ' d '}; String str2=NewString (a); System.out.println ("Str2=" +str2); //about the String method//length of string, number of charactersstr.length (); System.out.println ("Str=" +str.length ()); //Connection of Strings +       inti=100; String STR3=i+ ""; //Find StringStr2.indexof ("AB"); System.out.println (Index of A of "abc" = "+str2.indexof" ("a")); System.out.println (Index of AB for "abc" = "+str2.indexof" ("AB")); System.out.println (Index of "abc" AD = "+str2.lastindexof" ("a")); //determine if a string is included       if(Str2.indexof ("AC") >=0) {System.out.println (Contains); }Else{System.out.println ("Does not contain"); }       //look from behind .Str2= "Abcabc"; Str2.lastindexof (A); System.out.println (Index of a of "abcabc" = "+str2.lastindexof" ("a")); //Interception of strings (intercept substrings)Str2.substring (2); System.out.println (Interception of "abcabc" = "+str2.substring" (6)); System.out.println (Interception of "abcabc" = "+str2.substring" (2,4)); //go space before and afterstr2= "ABC ab C"; System.out.println ("Abcabc" The Go space = "+" # "+str2.trim () +" # "); //Find and replaceStr2.replace ("", "space"); System.out.println (Replacement space for "abcabc" = "+str2.replace (" "," Space "))); Str2.replacefirst ("", "space"); System.out.println (Replacement space for "abcabc" = "+str2.replacefirst (" "," Space "))); STR2="     "; if(Str2.trim (). Length () >0) {System.out.println ("With content"); }Else{System.out.println ("No content"); }            //Judging      /*string Stra=new string ("abc");//new keyword will open up new memory space string Strb=new string ("abc");       This can't be judged!! */String stra= "ABC";//the assignment is a constant,String strb= "ABC";//if the constant already exists, then give the address directly to the variable       if(Stra.equals (StrB))//determine if values are equal, case sensitive{System.out.println ("STRA=STRB"); }Else{System.out.println ("STRA!=STRB"); }                     if(Stra.equalsignorecase (StrB))//determine if values are equal, not case-sensitive{System.out.println ("STRA=STRB"); }Else{System.out.println ("STRA!=STRB"); }              //Start JudgingStr2= "ABCdef"; if(Str2.startswith ("ABC") {System.out.println ("STR2 begins with ABC"); }              //End of Judgment       if(Str2.endswith ("F") {System.out.println ("str2 ends with F"); }              //Uppercase and lowercaseSystem.out.println ("str2 Turn lowercase" +str2.tolowercase ()); System.out.println ("STR2 to uppercase" +str2.touppercase ()); String Info= "ABC#20#DEF#GGG";//There is a special delimiter to separate the composed stringString[]in =info.split ("#");  for(String t:in) {System.out.println ("info =" +t); }                 }}

String code example