如何運行類java使用runtime.exec（）？

Question

我必須通過另一個程序java使用runtime.exec（）運行一個類java。 文件夾中的類與我的程序不同，所以我無法運行它。 我使用了（java -cp“ directory”類），但是我的類具有導入文件，因此無法filenotfound？ 誰能幫我？

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

這是程序：

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();
    }
}

這是錯誤：[解析開始的RegularFileObject [E：\\ DA_Laptrinhmang \\ NguyenTo.java]] [解析完成的42ms] [源文件的搜索路徑：C：\\ Users \\ QUANG HUY \\ Documents \\ NetBeansProjects \\ ChamDiemJava \\ build \\ classes，C ：\\ Users \\ QUANG HUY \\ Documents \\ NetBeansProjects \\ ChamDiemJava \\ src] [類文件的搜索路徑：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] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Object.class）]] [正在加載ZipFileIndexFileObject [C ：： \\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / String.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1 .7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / FileNotFoundException.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym （META-INF / sym / rt.jar / java / io / IOException.class）]] [檢查NguyenTo] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF /sym/rt.jar/java/lang/Au​​toCloseable.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java /lang/Math.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk 1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Exception.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct。 sym（META-INF / sym / rt.jar / java / lang / Throwable.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / File.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / net / URI.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / FileInputStream.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / FileDescriptor.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / BufferedReader.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / InputStreamReader.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.s ym（META-INF / sym / rt.jar / java / io / InputStream.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / Reader.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Integer.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Number.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / FileOutputStream.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / BufferedWriter.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / OutputStreamWriter.class）]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / io / OutputStream.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-IN F / sym / rt.jar / java / io / Writer.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / Error.class）]] [加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / RuntimeException.class） ]] [正在加載ZipFileIndexFileObject [C：\\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / NumberFormatException.class）]] [正在加載ZipFileIndexFileObject [C： \\ Program Files \\ Java \\ jdk1.7.0 \\ lib \\ ct.sym（META-INF / sym / rt.jar / java / lang / IllegalArgumentException.class）]] [編寫了RegularFileObject [E：\\ DA_Laptrinhmang \\ NguyenTo.class]] [總441毫秒]成功建立（總時間：2秒）

Answer 1

這對我有用

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();
    }

}