shell无法在Java终端中运行多个命令

Question

我无法使用符号“&；”，运行多个命令，“&；”，"||", ";" 我检查了几乎所有提出这个问题的问题，但仍然找不到问题的答案。我可以在java命令shell中成功运行一个命令，但不能超过1个。提前感谢您的帮助

try {

                Process process = Runtime.getRuntime().exec("g++ " + projPath +" -o " + name + " && ./" + name);
                StringBuilder output = new StringBuilder();

                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(process.getInputStream()));
                
                BufferedReader errinput = new BufferedReader(
                        new InputStreamReader(process.getErrorStream()));

                String line;
                String err;
                while ((line = reader.readLine()) != null) {
                    output.append(line + "\n");
                }
                while ((err = errinput.readLine()) != null) {
                    output.append(err + "\n");
                }

                int exitVal = process.waitFor();
                if (exitVal == 0) {
                    acc.setExpandedPane(pane1);
                    txt.setStyle("-fx-text-fill: black;");
                    txt.setText(output.toString());
                } else {
                    acc.setExpandedPane(pane1);
                    txt.setStyle("-fx-text-fill: red;");
                    txt.setText(output.toString());
                }

            } catch (IOException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }