如何运行java类use runtime。exec（）？

Question

我必须通过另一个程序java use runtime运行java类。exec（）。文件夹中的一个类与我的程序不同，因此我无法运行它。我使用了（java-cp“directory”类），但my类有导入文件，所以找不到filenotfound？谁能帮我？

Process pro=Runtime.getRuntime（）. exec（"java-cp\"E：\DA_Laptrinhmang\"NguyenTo"）；

以下是程序：

import java.io.*;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
public class TestCodeJava {
  private static void printLines(String name, InputStream ins) throws Exception {
    String line = null;
    BufferedReader in = new BufferedReader( new InputStreamReader(ins));
    while ((line = in.readLine()) != null) {
        System.out.println(name + " " + line);
    }
  }
  private static void runProcess(String command) throws Exception {
    Process pro = Runtime.getRuntime().exec(command);
    BufferedReader reader = new BufferedReader(new InputStreamReader(pro.getInputStream()));
    pro.waitFor();
    String line = "";
    while((line = reader.readLine())!=null)
    {
        System.out.println(line);
    }
  }
  private static int toCompile(String fileToCompile)
  {
      JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
      int compilationResult = compiler.run(null,  null, null, "-verbose", fileToCompile);
      return compilationResult;
  }
  public static void main(String[] args) {
    try {
      if(toCompile("E:\\Folder\\Prime.java")==0)
      {
         runProcess("java -cp \"E:\\Folder\" Prime");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

    import java.io.*;
    public class Prime {
    private static boolean isPrime(int n)
    {
        if(n <= 1) return false;
        if(n == 2 || n == 3) return true;
        int m = (int) Math.sqrt(n);
        for(int i = 5; i <= m; i = i + 5)
            if(n % i == 0 || n % (i+2) == 0) return false;
        return true;
    }
    public static void main(String args[]) throws FileNotFoundException, IOException
    {
        File file = new File("INPUT.TXT");
        FileInputStream fis = new FileInputStream(file);
        BufferedReader reader = new BufferedReader(new InputStreamReader(fis));
        int n = Integer.parseInt(reader.readLine());
        File file2 = new File("OUTPUT.TXT");
        FileOutputStream fos = new FileOutputStream(file2);
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos));
        if(isPrime(n))
        {
            writer.write("YES");
        }else writer.write("NO");
        writer.flush();
        writer.close();
    }
}

以下是错误：[解析已启动RegularFileObject[E:\DA\u Laptrinhmang\NguyenTo.java][解析已完成42ms][源文件的搜索路径：C:\Users\QUANG HUY\Documents\NetBeansProject\ChamDiemJava\build\classes，C:\Users\QUANG HUY\Documents\NetBeansProject\ChamDiemJava\src][类文件的搜索路径：C:\Program files\Java\jdk1.7.0\jre\lib\resources.jar，C:\Program files\Java\jdk1.7.0\jre\lib\rt.jar，C:\Program files\Java\jdk1.7.0\jre\lib\jsse.jar，C:\Program files\Java\jdk1.7.0\jre\lib\jce.jar，C:\Program files\Java\jdk1.7.0\jre\jre.jar jar，C:\Program files\Java\jdk1.7.0\jre\classes，C:\Program files\Java\jdk1.7.0\jre\lib\ext\dnsns。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\localedata。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\sunec。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\sunjce\U提供程序。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\sunmscapi。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\sunpkcs11。jar，C:\Program Files\Java\jdk1.7.0\jre\lib\ext\zipfs。jar，C:\Users\QUANG HUY\Documents\NetBeansProjects\ChamDiemJava\build\classes，C： \Users\QUANG HUY\Documents\NetBeansProjects\ChamDiemJava\src][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Object.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/String.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/java/io/FileNotFoundException.class）]][加载ZipFileIndexFileObject[C:\Program Files\java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/java/io/IOException.class）]][检查NguyenTo][加载ZipFileIndexFileObject[C:\Program Files\java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/java/lang/AutoCloseable.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Math.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Exception.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Throwable.class）]]。[正在加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/File.class）][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/net/URI.class）][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/FileInputStream.class）]]][正在加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/FileDescriptor.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/BufferedReader.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/InputStream reader.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/InputStream.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/Reader.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/rt.jar/Java/lang/Integer.class）]]。[正在加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Number.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/FileOutputStream.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/BufferedWriter.class）]]类）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/OutputStreamWriter.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/OutputStream.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/io/Writer.class）]]类）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/Error.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/RuntimeException.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/NumberFormation.class）]][加载ZipFileIndexFileObject[C:\Program Files\Java\jdk1.7.0\lib\ct.sym（META-INF/sym/rt.jar/Java/lang/IllegalArgumentException.class）][Writed RegularFileObject[E:\DA\u Laptrinhmang\NguyenTo.class][total 441ms]构建成功（总时间：2秒）

Answer 1

这对我很管用

package mypackage;

import java.io.IOException;

public class RunSomeJava {

    public static void main(String[] args) throws IOException {
        Process pro = Runtime.getRuntime().exec("java -cp E:\\workspaceIndigo2\\StackOverflow\\bin mypackage.SomeOtherProgram");
    }

}

和

package mypackage;

import java.io.File;
import java.io.IOException;

public class SomeOtherProgram {

    public static void main(String[] args) throws IOException {
        File f = new File(System.currentTimeMillis()+".txt");
        f.createNewFile();
    }

}