javac错误：“包x不存在”在“import x” [英] javac error: "package x does not exist" at "import x"
问题描述
我试图使用命令提示符用以下命令编译我的java文件'check4PrimeTest.java'：
javac - classpath。：junit.jar check4PrimeTest.java
我得到以下错误：
错误：package junit.framework不存在import junit.framework。*;
我不知道为什么我得到这个错误，因为我有进口junit.framework。*在我的程序。
下面是我的代码：
package check4prime;
// check4PrimeTest.java
//导入
import junit.framework。*;
public class check4PrimeTest extends TestCase {
//初始化一个要使用的类。
private check4Prime check4prime = new check4Prime（）;
//构造函数
public check4PrimeTest（String name）{
super（name）;
}
//主入口点
public static void main（String [] args）{
System.out.println（Starting test ... ）;
junit.textui.TestRunner.run（suite（））;
System.out.println（Test finished ...）;
} // end main（）
//测试用例1
public void testCheckPrime_true（）{
assertTrue（check4prime.primeCheck（3））;
}
//测试用例2,3
public void testCheckPrime_false（）{
assertFalse（check4prime.primeCheck（0））;
assertFalse（check4prime.primeCheck（1000））;
}
//测试用例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（异常成功）{
//成功测试
}
} // end testCheck4Prime_checkArgs_char_input（）
//测试用例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（异常成功）{
//成功测试
}
} // end testCheck4Prime_checkArgs_upper_bound（）
//测试用例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（异常成功）{
//成功测试
}
} // end testCheck4Prime_checkArgs_neg_input（）
//测试用例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（异常成功）{
//成功测试
}
} // end testCheck4Prime_checkArgs_2_inputs
//测试用例8
public void testCheck4Prime_checkArgs_0_inputs（）{
try {
String [] args = new String [0];
check4prime.checkArgs（args）;
fail（should raise an Exception。）;
} catch（异常成功）{
//成功测试
}
} // end testCheck4Prime_checkArgs_0_inputs
// JUnit必需的方法。
public static Test suite（）{
TestSuite suite = new TestSuite（check4PrimeTest.class）;
return suite;
} // end suite（）
} // end check4PrimeTest
您收到此错误是因为您尝试导入包而不告诉您系统包装所在的位置。下面是关于告诉你的系统包在哪里的说明：
你的javac目标不指定任何东西，除了源和
目标目录 - 它不添加任何类路径条目;您将需要
为相应的JUnit jar文件添加条目。有关更多详细信息，请参阅javac任务
文档。您可能需要将
JUnit的路径指定为类路径属性，嵌套元素或对其他地方声明的
路径的引用。
资料来源：在Eclipse中使用Ant运行JUnit测试的问题。初级问题
提示> javac -classpath。; $ JUNIT_HOME\junit4.xxjar test.java
编辑：JUNIT INSTALLATION =http://junit.sourceforge.net/doc/faq/faq.htm#started =nofollow>此处）：
pre>
1。将junit.zip分发文件解压缩到称为％JUNIT_HOME％的目录。
2.将JUnit添加到类路径（在命令行shell中键入以下内容）：`set CLASSPATH =％CLASSPATH％;％JUNIT_HOME％\junit.jar`
Unix（bash）
要在Unix上安装JUnit，请按照下列步骤：
1。将junit.zip分发文件解压缩到称为$ JUNIT_HOME的目录。
2.将JUnit添加到类路径（在终端中键入以下内容）：
`export CLASSPATH = $ CLASSPATH：$ JUNIT_HOME / junit.jar`
I'm trying to compile my java file 'check4PrimeTest.java' using the command prompt with the following command:
javac -classpath .:junit.jar check4PrimeTest.java
I get the following error:
error: package junit.framework does not exist import junit.framework.*;
I'm not sure why i get this error as i have import junit.framework.* in my program.
below is my code:
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
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:
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.
Source: problem running JUnit tests with Ant in Eclipse. Beginner question
prompt> javac -classpath .;$JUNIT_HOME\junit4.x.x.jar test.java
EDIT: JUNIT INSTALLATION (from here):
Windows
To install JUnit on Windows, follow these steps:
1. Unzip the junit.zip distribution file to a directory referred to as %JUNIT_HOME%. 2. Add JUnit to the classpath (type the following into a command line shell): `set CLASSPATH=%CLASSPATH%;%JUNIT_HOME%\junit.jar`Unix (bash)
To install JUnit on Unix, follow these steps:
1. Unzip the junit.zip distribution file to a directory referred to as $JUNIT_HOME. 2. Add JUnit to the classpath (type the following into terminal): `export CLASSPATH=$CLASSPATH:$JUNIT_HOME/junit.jar`
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