javac 错误:“包 x 不存在"；在“进口x"处

编程入门行业动态更新时间:2024-10-27 03:39:48

本文介绍了javac 错误:“包 x 不存在"；在“进口x"处的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我正在尝试使用命令提示符和以下命令编译我的 java 文件check4PrimeTest.java":

I'm trying to compile my java file 'check4PrimeTest.java' using the command prompt with the following command:

javac -classpath .:junit.jar check4PrimeTest.java

我收到以下错误:

错误:包 junit.framework 不存在 import junit.framework.*;

error: package junit.framework does not exist import junit.framework.*;

我不知道为什么会出现这个错误，因为我的程序中有 import junit.framework.*.

I'm not sure why i get this error as i have import junit.framework.* in my program.

下面是我的代码:

package check4prime; // check4PrimeTest.java //Imports import junit.framework.*; public class check4PrimeTest extends TestCase { //Initialize a class to work with. private check4Prime check4prime = new check4Prime(); //constructor public check4PrimeTest (String name) { super(name); } //Main entry point public static void main(String[] args) { System.out.println("Starting test..."); junit.textui.TestRunner.run(suite()); System.out.println("Test finished..."); } // end main() //Test case 1 public void testCheckPrime_true() { assertTrue(check4prime.primeCheck(3)); } //Test cases 2,3 public void testCheckPrime_false() { assertFalse(check4prime.primeCheck(0)); assertFalse(check4prime.primeCheck(1000)); } //Test case 7 public void testCheck4Prime_checkArgs_char_input() { try { String [] args= new String[1]; args[0]="r"; check4prime.checkArgs(args); fail("Should raise an Exception."); } catch (Exception success) { //successful test } } //end testCheck4Prime_checkArgs_char_input() //Test case 5 public void testCheck4Prime_checkArgs_above_upper_bound() { try { String [] args= new String[1]; args[0]="10001"; check4prime.checkArgs(args); fail("Should raise an Exception."); } catch (Exception success) { //successful test } } // end testCheck4Prime_checkArgs_upper_bound() //Test case 4 public void testCheck4Prime_checkArgs_neg_input() { try { String [] args= new String[1]; args[0]="-1"; check4prime.checkArgs(args); fail("Should raise an Exception."); } catch (Exception success) { //successful test } } // end testCheck4Prime_checkArgs_neg_input() //Test case 6 public void testCheck4Prime_checkArgs_2_inputs() { try { String [] args= new String[2]; args[0]="5"; args[1]="99"; check4prime.checkArgs(args); fail("Should raise an Exception."); } catch (Exception success) { //successful test } } // end testCheck4Prime_checkArgs_2_inputs //Test case 8 public void testCheck4Prime_checkArgs_0_inputs() { try { String [] args= new String[0]; check4prime.checkArgs(args); fail("Should raise an Exception."); } catch (Exception success) { //successful test } } // end testCheck4Prime_checkArgs_0_inputs //JUnit required method. public static Test suite() { TestSuite suite = new TestSuite(check4PrimeTest.class); return suite; } //end suite() } //end check4PrimeTest

推荐答案

您收到此错误是因为您在尝试导入包时未告知系统包所在的位置.以下是告诉您的系统包所在位置的说明:

You are getting this error because you're trying to import a package without telling your system where the package is located. Here are instructions on telling your system where the package is located:

您的 javac 目标除了源和目标目录 - 它不添加任何类路径条目；你需要为相应的 JUnit jar 文件添加一个条目.查看 javac 任务文档了解更多详情.您可能想要指定路径JUnit 作为类路径属性、嵌套元素或对在别处声明的路径.

Your javac target doesn't specify anything apart from the source and target directory - it doesn't add any classpath entries; you'll need to add an entry for the appropriate JUnit jar file. See the javac task documentation for more details. You may want to specify the path to JUnit as a classpath attribute, a nested element, or a reference to a path declared elsewhere.