如何从Java中使用exec调用telnet？

Question

似乎有语法问题：

thufir@dur:~/NetBeansProjects/mud$ 
thufir@dur:~/NetBeansProjects/mud$ telnet localhost
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
thufir@dur:~/NetBeansProjects/mud$ 
thufir@dur:~/NetBeansProjects/mud$ gradle clean run

> Task :run FAILED
Exception in thread "main" java.io.IOException: Cannot run program "telnet localhost": error=2, No such file or directory
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
        at mud.App.telnet(App.java:29)
        at mud.App.main(App.java:33)
Caused by: java.io.IOException: error=2, No such file or directory
        at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
        at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:340)
        at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:271)
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
        ... 3 more

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/home/thufir/.sdkman/candidates/java/11.0.7.hs-adpt/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 916ms
3 actionable tasks: 3 executed
thufir@dur:~/NetBeansProjects/mud$

代码：

/*
 * This Java source file was generated by the Gradle 'init' task.

sh -c telnet rainmaker.wunderground.com 3000 | tee weather.txt


telnet rainmaker.wunderground.com | tee -a -i telnet.log



 */
package mud;

import java.io.IOException;
import java.util.logging.Logger;

public class App {

    private final static Logger log = Logger.getLogger(App.class.getName());

    private void telnet() throws IOException {
        String s = "telnet rainmaker.wunderground.com | tee -a -i telnet.log";
        String t = "cmd /c telnet localhost 4445";
        String u = "telnet localhost 4445 | tee -a -i /home/thufir/telnet.log";
        String v = "telnet localhost";
        log.fine(s);

        ProcessBuilder processBuilder = new ProcessBuilder(v);
        Process process = processBuilder.start();
    }

    public static void main(String[] args) throws IOException {
        new App().telnet();
    }

}

如何使用exec从Java调用telnet并将日志传送到文件？

另请参见：

How to send a String via Telnet?

how to pipe telnet through tee with Java exec

How to use Telnet from Java