I write Java programs for my own needs; I’m not a professional programmer. The following simple Java program illustrates a basic way a scanner can be tested.<\/p>\n
The Scanner class is a Java utility that can read separate values from a stream of data. One use of a scanner is to read through a line of data in which a number is expected. If the number is in there, the scanner likely will find it, provided it doesn’t include any non-numeric characters. Also, it seems, the number can’t be “touching” any non-numeric characters; it must be separate from other text.<\/p>\n
Here’s the little program I wrote: I ran this program on Windows; my Linux compiler can be more strict, but I’m optimistic it will work there too.<\/p>\n To the Java programmers who will come looking for a scanner example: hope this helps. For my casual readers who aren’t as familiar with Java, I will be explaining how to get up and running with it in future posts.<\/p>\n Tomorrow, I’ll discuss the program above and some findings from the tests I ran with it:)<\/p>\n Source:<\/p>\n Kurniawan, Budi. Java 5: A Beginner’s Tutorial<\/em>. 2006: Brainy Software Corp.<\/p>\n
\n
\nimport java.util.*;
\nclass TryScanner{
\npublic static void main(String[] args){
\nfor (int i=0;i<args.length;i++){
\nScanner scan0=new Scanner(args[i]);
\nif(scan0.hasNextDouble()){
\nSystem.out.println(“Readable number: “+scan0.nextDouble());
\n}
\n
\nelse{
\nSystem.out.println(“Not a readable number: “+scan0.next());
\n}
\n}\/\/end of for loop<\/span>
\nSystem.out.println(“\\n\\nSee you again:)”);
\n}\/\/end of main() method<\/span>
\n}\/\/end of class<\/span><\/p>\n