java scanner documentation

System.out.println (NA me); 8} 9}　　Bufferreader is located in the Java.io package, you need to import java.io.*, or import java.io.BufferedReader;.The use of Bufferreader is relatively not so many ways to let you choose, reading data is fixed, so the format is relatively single, just remember the method of reading the data. Bufferreader br = new Bufferreader (new InputStreamReader (system.in));. The Bufferreader object reads the data through the ReadLine () method, ReadLine () read

Java Scanner ClassJava.util.Scanner is a new feature of JAVA5, and we can get the user's input through the Scanner class.Here is the basic syntax for creating a Scanner object:New Scanner (system.in);Next we demonstrate the simplest data input, and get the input string throu

:" +matchresult.group (3));}}}Output:ip:127.0.0.1User:adminDate:2015-12-01ip:127.0.0.2User:raydate:2015-12-03ip:127.0.0.31User:rosedate:2015-12-05ip:127.0.0.41User:jackdate:2015-12-07In the above code there is a very important place to note is the writing of regular expressions, especially a few parentheses, because the string can be grouped by a few parentheses. If there are no parentheses, the following group (1) Group (2) will throw an exception.Summary: This chapter simply describes the boun

Scanner is a new class that SDK1.5 adds, but uses this class to create an object.Scanner reader=new Scanner (system.in);The reader object then calls the following methods (functions) to read the various data types that the user entered at the command line:Next. Byte (), nextdouble (), Nextfloat,nextint (), Nextlin (), Nextlong (), Nextshot ()The above method will cause blocking when running, waiting for the

; } Execution Process: If the conditional expression value is true, the code is executed If the conditional expression value is false, the code is not executed3.for Loop, while loop, Do.....while loop 1.for(Condition: ①;②;③) { Loop statement:④; The order of execution is:①==>②==>④==>③ 2. while(condition) {Loop statement;Thewhile loop indicates that it is executed first, and will not be executed once if the loop condition is not satisfied. 3. Do{Loop statement;}

When writing a program in Java, some data require user input, this time need to call Java provides scanner class, this class in the package java.util, such as to find a rectangular area, a simple look at the usage:1 ImportJava.util.Scanner;2 Public classJavashuru {3 //Java gets user input, using the

) { Chartemp =Arr[i]; Arr[i]= Arr[arr.length-1-i]; Arr[arr.length-1-i] =temp; } String str1= "" ; for(CharC:arr) {str1= str1 +C; } System.out.println (STR1); }Count The number of occurrences of a large string of small strings Public Static voidMain (string[] args) {Scanner sc=NewScanner (system.in); System.out.println ("Please enter a larger string:"); String Strbig=Sc.nextline (); System.out.println ("Please enter a smaller st

() method and the Nextline () method, because Nextline () consumes the line feed. You can refer to the correct wording of this program (Http://code.geeksforgeeks.org/CErAhD). This problem and the scanf () in C + + (http://www.geeksforgeeks.org/problem-with-scanf-when-there-is-fgetsgetsscanf-after-it/) Method follows the same problem as the gets () method. Other points of difference: BufferedReader is supported for synchronization, and scanner is no

read in the method, the read value is 1 because the input stream is closed;3, in the scanner Readinput method has the following code:Try=catch==-1;} if (n = =-1truefalse;}4, because read 1 on the set sourceclosed =true;neepinput=false;5. The following code is in the next method:if (Needinput) readinput (); Else throwfor ();6, when the Needinput is false, the execution of throwfor, so look at throwforfalse ; if ((sourceclosed) (position = = Buf.limit

enter the number you guessed:----"); Scanner SC=NewScanner (system.in); intEnternumber =Sc.nextint (); //3. Pass the while loop to guess the wrong number//guess right, jump out of the loop, game over while(Enternumber! =Randomnumber) { //guess wrong, according to the results, give hints, and then guess the numbers, the game continues if(enternumber>Randomnumber) { //If you guessed big, print sorry, you gue