io.FileNotFoundException; // Import this class to handle errors import java.util.Scanner; // Import the Scanner class to read text files public class ReadFile { public static void main(String[] args) { try { File myObj = new File("filename.txt"); Scanner myReader = new Scanner(my...
importjava.util.Scanner;// Import the Scanner classclassMain{publicstaticvoidmain(String[]args){ScannermyObj=newScanner(System.in);// Create a Scanner objectSystem.out.println("Enter username");StringuserName=myObj.nextLine();// Read user inputSystem.out.println("Username is: "+userName);//...
java.util.scanner的nextfloat（）或nextdouble（）方法可用于实现读取浮点输入的所需需求。
java.util.scanner的nextfloat（）或nextdouble（）方法可用于实现读取浮点输入的所需需求。
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The next() method returns a string containing the next token in the scanner.If the pattern parameter is used, then it will throw an exception when the token does not match the regular expression specified by the parameter.Learn more about the regular expressions in our Java RegEx tutorial....
Returns: A reference to the Scanner object that this method belongs to, which allows for chaining configuration methods. An example of chaining is myObj.reset().useDelimiter(",");. Java version: 1.6+❮ Scanner MethodsTrack your progress - it's free! Log in Sign Up ...
ExampleGet your own Java Server Show the radix that is currently being used by the scanner: // Create a scanner object Scanner myObj = new Scanner("A string to scan"); // Display the radix (defaults to 10) System.out.println(myObj.radix()); ...
ExampleGet your own Java Server Print the value of every floating point number in the string: // Create a scanner object Scanner myObj = new Scanner("The probability is 45.6 percent"); // Print the value of every floating point number in the scanner while (myObj.hasNext()) { if (my...
ExampleGet your own Java Server Print the first boolean value that is found: // Create a scanner object Scanner myObj = new Scanner("The value is false"); // Skip tokens until a boolean is found while (myObj.hasNext() && !myObj.hasNextBoolean()) { myObj.next(); } // If there...