如何从另一个java程序启动一个java程序

Question

我在netbeans项目的一个包内有两个java程序。一个是Run.java，另一个是JdbcSqlServerConnectivity.java。我提到了之前关于这个话题的问题，但没有一个解决方案似乎是有效的。我得到以下错误

javac JdbcSqlServerConnectivity.java stderr: javac: file not found: JdbcSqlServerConnectivity.java
javac JdbcSqlServerConnectivity.java stderr: Usage: javac <options> <source files>
javac JdbcSqlServerConnectivity.java stderr: use -help for a list of possible options
javac JdbcSqlServerConnectivity.java exitValue() 2
java JdbcSqlServerConnectivity stderr: Error: Could not find or load main class JdbcSqlServerConnectivity
java JdbcSqlServerConnectivity exitValue() 1

Run.java代码

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Run {
  private static void printLines(String name, InputStream ins) throws Exception {
    String line;
    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 + "");
    printLines(command + " stdout:", pro.getInputStream());
    printLines(command + " stderr:", pro.getErrorStream());
    pro.waitFor();
    System.out.println(command + " exitValue() " + pro.exitValue());
  }
  public static void main(String[] args) {
    try {
      runProcess("javac JdbcSqlServerConnectivity.java");
      runProcess("java JdbcSqlServerConnectivity");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

Thanks in advance

Answer 1

您应该提供文件JdbcSqlServerConnectivity.java的完整系统路径。例如，如果JdbcSqlServerConnectivity.java位于D:Tempcomexample目录中，那么您应该这样指定:

runProcess("javac D:\Temp\com\example\JdbcSqlServerConnectivity.java");
runProcess("java D:\Temp\com\example\JdbcSqlServerConnectivity");

Answer 2

try this:

runProcess("java -cp fullpath JdbcSqlServerConnectivity.java");