如何从 Robert Sedgewick 的算法教科书中运行 Java 个程序？

Question

I apologize for a rookie question. I am trying to run the Java programs in Eclipse given in the Algorithms, 4th edition book by Robert Sedgewick and Kevin Wayne: https://algs4.cs.princeton.edu/home/

I am having trouble with input arguments to the programs.

For example for the following program:

import java.util.Arrays;

public class BinarySearch
{
    public static int rank(int key, int[] a)
    { // Array must be sorted.
     int lo = 0;
        int hi = a.length - 1;
        while (lo <= hi)
        { // Key is in a[lo..hi] or not present.

          int mid = lo + (hi - lo) / 2;
            if (key < a[mid]) hi = mid - 1;
            else if (key > a[mid]) lo = mid + 1;
            else return mid;
        }
        return -1;
    }



    public static void main(String[] args)
    {

        int[] whitelist = In.readInts(args[0]);
        Arrays.sort(whitelist);
        while (!StdIn.isEmpty())
        { // Read key, print if not in whitelist.        
         int key = StdIn.readInt();
            if (rank(key, whitelist) < 0)
            StdOut.println(key);
        }    
    }
}

The input arguments are:

% java BinarySearch tinyW.txt < tinyT.txt

I don't know where to pass input arguments in Eclipse. Any help will be appreciated.

Answer 1

Go in "Run configuration..." opening the menu of the play button.

You find what you need in arguments, environment tab and common. Actually common is the tab that you need.

Answer 2

Thanks everyone! I solved it. Apparently the newer libraries provided on the book site vary a bit from the book that I have.

I changed the main function as follows:

import java.util.Arrays;
public class BinarySearch{
public static int rank(int key, int[] a)
{ // Array must be sorted.
    int lo = 0;
    int hi = a.length - 1;
    while (lo <= hi)
    { // Key is in a[lo..hi] or not present.
        int mid = lo + (hi - lo) / 2;
        if (key < a[mid]) hi = mid - 1;
        else if (key > a[mid]) lo = mid + 1;
        else return mid;
    }
    return -1;
}

public static void main(String[] args)
{
    In i = new In(args[0]);
    In j = new In(args[1]);
    int[] whitelist = i.readAllInts();
    int[] iplist = j.readAllInts();
    Arrays.sort(whitelist);
    for (int key:iplist)
    { // Read key, print if not in whitelist.
        if (rank(key, whitelist) < 0)
        StdOut.println(key);
    }
}
}

Then pass

"tinyW.txt" "tinyT.txt"

as Program arguments as indicated by @GDG612 .

Answer 3

右键单击您的程序，然后选择Run As -> Run Configurations...然后单击(x)= Arguments选项卡，并将输入传递到程序的“ Program arguments

Answer 4

you didn't have to change code, the library it is still work. but just how you compile is little bit different. for educational purposes i am put jar into src.

tools:
vscode without plugin
jdk 17

compile:
javac -cp./src/algs4.jar: BinarySearch.java
java -cp./src/algs4.jar: BinarySearch tinyAllowlist.txt < tinyText.txt