console input function for rhino?

Question

How do I accept a variable from the console with javascript in Rhino? anything similar to cin or scanf?

Pricecutting

Answer 1

Here's two lines that'll do what you want:

var stdin = new BufferedReader( new InputStreamReader(System['in']) )
var aLine = stdin.readLine();

Photomultiplier

In that case, how can I write a function that sets a variable to the console input? function getInput(variable){ //code goes here } – Bellicose

Answer 2

I hope this will help you:

Simple function that reads a line from console

function readline()
{
    var ist = new java.io.InputStreamReader(java.lang.System.in); 
    var bre = new java.io.BufferedReader(ist); 
    var line = bre.readLine();
    return line;
}
print("Name? ");
var name=readline();
print("Your name is: "+name);

Harbour

Answer 3

In Rhino you have to remember to import Java packages before you can use them. Also, Java String differs from JavaScript native String, so you may want to cast it.

Here is a quick-and-dirty readln() that works the same in both SpiderMonkey and Rhino:

 var readln = (typeof readline === 'function') ? (readline) : (function() {
     importPackage(java.io);
     importPackage(java.lang);
     var stdin = new BufferedReader(new InputStreamReader(System['in']));

     return function() {
         return String(stdin.readLine());  // Read line, 
     };                                    // force to JavaScript String
 }());

Geanticline

Answer 4

Just use the Java class library. I think this will work:

var stdin = java.lang.System.in;
var line = stdin.readLine();

At that point it's easy to convert the line to whatever type you like, or to break it into pieces using a RegExp.

This could garble Unicode input, but I'm not sure there's a good way around that, cross-platform.

Array

Answer 5

var ins = java.lang.System.in;
var newLine = java.lang.System.getProperty("line.separator");
var is = new java.io.InputStreamReader(ins);
var sb=new java.lang.StringBuilder();
var br = new java.io.BufferedReader(is);
var line = br.readLine();
while(line != null) {
    sb.append(line);
    sb.append(newLine);
    line = br.readLine();
}
var stdin = ""+sb.toString();//java string != javascript string
console.log("stdin:"+stdin);

Unparalleled

Answer 6

Instead of a BufferedReader, you can use a Console:

var console = java.lang.System.console() 
var name = console.readLine("What is your name? ");

Vulcanize