System.setProperty("file.encoding", "UTF-8");
File -> Settings -> Editor -> File Encodings -> Project Encodings
将 Project Default Encoding 设置为 UTF-8
在源文件的第一行添加:
// @formatter:off
public class MyClass {
// @formatter:on
Scanner scanner = new Scanner(new File("input.txt"), "UTF-8");
BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt", "UTF-8"));
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