'How to implement Pattern Layout in log4j2 2.17.1 migrated from log4j 1.2.17 version?

Migrated from log4j 1.2.17 to log4j2 2.17.1 and getting issue in Pattern Layout class.

    PatternLayout pl = PatternLayout();
            pl.setConversionPattern("%m  :%d%n");
            // setFile(new File(theQFileName));
            FileAppender appender;
            try {
                appender = new FileAppender(pl, theQFileName, false);
                lLogger.addAppender(appender);
            }

Above snippet was used in log4j 1.2.17 version and after migration getting compilation error for Pattern Layout and File Appender class.

[ERROR]         PatternLayout pl = new PatternLayout();
[ERROR]                            ^^^^^^^^^^^^^^^^^^^
[ERROR] The constructor PatternLayout() is undefined

[ERROR]         pl.setConversionPattern("%m  :%d%n");
[ERROR]            ^^^^^^^^^^^^^^^^^^^^
[ERROR] The method setConversionPattern(String) is undefined for the type PatternLayout

[ERROR]         appender = new FileAppender(pl, theQFileName, false);
[ERROR]                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR] The constructor FileAppender(PatternLayout, String, boolean) is undefined
java


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