如何为嵌套的Java类创建构造器/构建器？

public class OuterClass {
    private int outerVariable;
    
    public OuterClass(int outerVariable) {
        this.outerVariable = outerVariable;
    }
    
    public class InnerClass {
        private int innerVariable;
        
        public InnerClass(int innerVariable) {
            this.innerVariable = innerVariable;
        }
        
        public void display() {
            System.out.println("Outer variable: " + outerVariable);
            System.out.println("Inner variable: " + innerVariable);
        }
    }
    
    public static void main(String[] args) {
        OuterClass outer = new OuterClass(10);
        OuterClass.InnerClass inner = outer.new InnerClass(20);
        inner.display();
    }
}