Java I/O - 如何重定向標(biāo)準(zhǔn)錯(cuò)誤到文件

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import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
  public static void main(String[] args) throws Exception {
    System.setErr(new PrintStream(new FileOutputStream("system_err.txt")));
    String nullString = null;
    nullString = nullString.toUpperCase();
  }
}
 
 
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