java怎么打开命令行窗口

Runtime rt = Runtime.getRuntime();

ProcessBuilder pb = new ProcessBuilder("cmd.exe");

Process p = pb.start();

// 重定向标准输出
ProcessBuilder pb = new ProcessBuilder("cmd.exe").redirectOutput(Redirect.PIPE);

// 重定向标准输入
ProcessBuilder pb = new ProcessBuilder("cmd.exe").redirectInput(Redirect.PIPE);

// 重定向标准错误
ProcessBuilder pb = new ProcessBuilder("cmd.exe").redirectErrorStream(true);

import java.io.IOException;

public class OpenCommandLine {

    public static void main(String[] args) {
        try {
            // 创建 Runtime 对象
            Runtime rt = Runtime.getRuntime();

            // 创建 ProcessBuilder 对象
            ProcessBuilder pb = new ProcessBuilder("cmd.exe");

            // 启动 ProcessBuilder 对象
            Process p = pb.start();

            // 等待进程完成
            p.waitFor();
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}