如何运行类java使用runtime.exec（）？

Question

我必须通过另一个程序java使用runtime.exec（）运行一个类java。 文件夹中的类与我的程序不同，所以我无法运行它。 我使用了（java -cp“ directory”类），但是我的类具有导入文件，因此无法filenotfound？ 谁能帮我？

流程pro = Runtime.getRuntime（）。exec（“ java -cp \\” E：\\ DA_Laptrinhmang \\“ NguyenTo”）;

这是程序：

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();
    }
}

这是错误：[解析开始的RegularFileObject [E：\\ DA_Laptrinhmang \\ NguyenTo.java]] [解析完成的42ms] [源文件的搜索路径：C：\\ Users \\ QUANG HUY \\ Documents \\ NetBeansProjects \\ ChamDiemJava \\ build \\ classes，C ：\\ Users \\ QUANG HUY \\ Documents \\ NetBeansProjects \\ 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 \\ sunrsasign.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 \\ lib \\ charsets.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_provider.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：\\ Progr 是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] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Object.class）]] [正在加载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）]] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym （META-INF / sym / rt.jar / java / io / IOException.class）]] [检查NguyenTo] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF /sym/rt.jar/java/lang/Au​​toCloseable.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 \\ jdk 1.7.0 \\ 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）]] [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）]] [正在加载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）]] [正在加载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 / InputStreamReader.class）]] [加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.s ym（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 / sym / 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）]] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / FileOutputStream.class）]] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / BufferedWriter.class）]] [加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / OutputStreamWriter.class）]] [正在加载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-IN F / sym / rt.jar / java / io / Writer.class）]] [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） ]] [正在加载ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / NumberFormatException.class）]] [正在加载ZipFileIndexFileObject [C： \\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / IllegalArgumentException.class）]] [编写了RegularFileObject [E：\\ DA_Laptrinhmang \\ NguyenTo.class]] [总441毫秒]成功建立（总时间：2秒）

Answer 1

这对我有用

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();
    }

}