範例

public class Outer {

private final class Inner1 {

private final class Inner2 {

private final class Inner3 {

}
}
}

}

解決方案
將所有巢狀的內部類別移至內部類別最外層。

public class Outer {

private final class Inner1 {}

private final class Inner2 {}

private final class Inner3 {}

}