Eclipse reading stdin (System.in) from a file

 1 year ago
source link: https://www.codesd.com/item/eclipse-reading-stdin-system-in-from-a-file.html
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.

Eclipse reading stdin (System.in) from a file


Is it possible for Eclipse to read stdin from a file?

Pure Java

You can redirect System.in with a single line of code:

System.setIn(new FileInputStream(filename));

See System.setIn().

Eclipse config

In Eclipse 4.5 or later, the launch configuration dialog can set System.in to read from a file. See the announcement here.

Related Articles

How to read in a duplicate from a file in C ++

How do you read in a double from a file in C++? For ints I know you can use the getline() and then atoi, but I am not finding an array to double function. What is available for reading in doubles, or converting a char array to a double?You can use st

What is the best way in PHP to read the last lines from a file?

In my PHP application I need to read multiple lines starting from the end of many files (mostly logs). Sometimes I need only the last one, sometimes I need tens or hundreds. Basically, I want something as flexible as the Unix tail command. There are

Java - Reading in signed integers from a file

I am trying to read in 10 signed integers from a file into an array and for some reason, it is not happening and I am not getting any errors at compile and runtime. I just wanted a second pair of eyes to look over this and see what I might be missing

How to read double in java from a file

I'm trying to read a double from a file but I have this exception: java.util.InputMismatchException. I've tried to do the useLocale(Locale.US) but it doesn't work. This is my code public static void main(String[] args){ System.out.println("Introduce

How do I read only whole numbers from the file?

I got a problem when I'm trying to read int from text file. I'm using this kind of code import java.util.Scanner; import java.io.*; File fileName =new File( "D:\\input.txt"); try { Scanner in = new Scanner(fileName); c = in.nextInt(); n = in.nex

to read the huge data from the file and analyze the date effectively. How to improve performance for huge data?

I am reading huge data from a file as: //abc.txt 10 12 14 15 129 -12 14 -18 -900 -1234 145 12 13 12 32 68 51 76 -59 -025 - - - - etc fun(char *p, int x, int y, int z) { } I have tried to use atoi, strtok, but they are real time consuming when the arr

Read the first line from a file stored in Azure Cloud Blob Storage

I'm trying to read the First line of the file, the file is stored in Azure Storage Blob Container. Below code snippet is standard code to read a file till end and write the content: foreach (IListBlobItem item in container.ListBlobs(null, false)) { i

Starting Python Error: Reading and Adding Numbers from a File

so i'm trying to pull numbers from a file numbers.txt and add them together. The program can currently pull the numbers one at a time and print them spaced out on one line. I now need it to total all of the values. The numbers in the file are: 9 19 1

How to read unsigned int variables from the file correctly, using ifstream?

My code reads unsigned int variables from the text file Input_File_Name. unsigned int Column_Count; //Cols unsigned int Row_Count;//Rows try { ifstream input_stream; input_stream.open(Input_File_Name,ios_base::in); if (input_stream) { //if file is op

How to read in a matrix from a file in C ++?

I am attempting to read in an n × n matrix from a file and then store that matrix in a one dimensional array. I would also like to store the value for n. I have looked into various approaches but can't seem to apply them to what I'm trying to achieve

How do I read the uncertain data from the file and store it in struct

I have a trouble to read data from a file. The file: 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 23 liu zhengzhi 90 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 in the file you not sure one line is 0 0.0 or int char* char* do

Using Serializable other than Writing & amp; Read the object to / from the file

In Which Cases it is a good coding practice to use implements serializable other than Writing & Reading object to/from file.In a project i went through code. A class using implements serializable even if in that class/project no any Writing/Reading o

read the xml tag from a file containing a single row in the bat file

I have to read a particular tag from a xml file which has the whole content in a single line. For example my employee.xml file will look something as shown below <EMP><FNAME>ss</FNAME><LNAME>rr</LNAME><ID>11</ID>&

in C I want to read line by line from a file in a certain way with the end of editing the file

Ok I need to read information in from a file. I have to take certain parts of the line apart and do different things with each part. I know the maximum and minimum length of the file but I am doing something wrong when I read in the file and then spl

About Joyk

Aggregate valuable and interesting links.
Joyk means Joy of geeK