如何将对外部类的引用传递给内部类中的方法？(或者如何将"this"传递给内部类？)

public class OuterClass {
    private String outerVar;

    public OuterClass(String outerVar) {
        this.outerVar = outerVar;
    }

    public class InnerClass {
        private String innerVar;

        public InnerClass(String innerVar) {
            this.innerVar = innerVar;
        }

        public void method() {
            System.out.println("Outer var: " + outerVar + ", Inner var: " + innerVar);
        }
    }
}

public class OuterClass {
    private String outerVar;

    public OuterClass(String outerVar) {
        this.outerVar = outerVar;
    }

    public static class InnerClass {
        private String innerVar;

        public InnerClass(String innerVar) {
            this.innerVar = innerVar;
        }

        public void method(OuterClass outer) {
            System.out.println("Outer var: " + outer.outerVar + ", Inner var: " + innerVar);
        }
    }
}