Java读取文本文件并搜索一行

Question

我有以下代码，它读取文件并搜索以主题开头的行并打印出该行。但我只想读取包含“主题”的第一行，但目前它获取以“主题”开头的所有行，如何配置以使其搜索第一个“主题”并打印该行？

            br = new BufferedReader(new FileReader("FilePath"));
            StringBuilder sb = new StringBuilder();
            String line = "";

            while ((line = br.readLine()) != null) {

                if (line.startsWith("Subject ")) {
                    System.out.println(line);

                }
            }

Answer 1

使用中断；声明，

br = new BufferedReader(new FileReader("FilePath"));
            StringBuilder sb = new StringBuilder();
            String line = "";

            while ((line = br.readLine()) != null) {

                if (line.startsWith("Subject ")) {
                    System.out.println(line);
                    break;
                }
            }