Java Zeichenkodierung einstellen

Hallo Gemeinde.
Ich komme nicht weiter, die Anleitungen im Internet sind sehr verwirrend. Ich muss bei Java irgendwie einstellen, dass die Zeichenkodierung UTF-8 ist. Wie kriege ich das hin? Bitte helft mir.

Java
UTF
Utf-8
Encoding
Zeichenkodierung
Eclipse

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