java错误：无法找到或加载主类BinarySearch

Question

我正在阅读 Sedgewick 的《算法》（第四版）。代码是这样的：

package edu.princeton.cs.algs4;

import java.util.Arrays;

/**

 *  The {@code BinarySearch} class provides a static method for binary

 *  searching for an integer in a sorted array of integers.

 *  <p>

 *  The <em>indexOf</em> operations takes logarithmic time in the worst case.

 *  <p>

 *  For additional documentation, see <a href="https://algs4.cs.princeton.edu/11model">Section 1.1</a> of

 *  <i>Algorithms, 4th Edition</i> by Robert Sedgewick and Kevin Wayne.

 *

 *  @author Robert Sedgewick

 *  @author Kevin Wayne

 */

public class BinarySearch {

    private BinarySearch() { }

    public static int indexOf(int[] a, int key) {

        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;

    }

    @Deprecated

    public static int rank(int key, int[] a) {

        return indexOf(a, key);

    }

    public static void main(String[] args) {

        // read the integers from a file

        In in = new In(args[0]);

        int[] whitelist = in.readAllInts();

        // sort the array

        Arrays.sort(whitelist);

        // read integer key from standard input; print if not in whitelist

        while (!StdIn.isEmpty()) {

            int key = StdIn.readInt();

            if (BinarySearch.indexOf(whitelist, key) == -1)

                StdOut.println(key);

        }

    }

}

我已经成功编译了代码：

javac -cp /Users/user/documents/algorithms/algs4-master/target/algs4-1.0.0.0.jar BinarySearch.java

但是当我尝试运行代码时，出现错误：

user$ java -cp /Users/user/documents/algorithms/algs4-master/target/algs4-1.0.0.0.jar BinarySearch 错误：无法找到或加载主类 BinarySearch 原因：java.lang.ClassNotFoundException：BinarySearch

请帮忙告诉我这里发生了什么事。多谢！

Answer 1

提供包含 main 方法和不包含 main 方法的类的整个包，.java因为您正在运行该类，而不是 java 文件：edu.princeton.cs.algs4javac&nbsp;-cp&nbsp;/Users/user/documents/algorithms/algs4-master/target/algs4-1.0.0.0.jar&nbsp;edu.princeton.cs.algs4.BinarySearch