export class KsqlDbCluster {

    private readonly _clusterName: string

    constructor(clusterName: string) {
        this._clusterName = clusterName
    }
    private readonly _k8nCluster: gcp.container.Cluster = this.buildCluster(this._clusterName)

const ksqlDbClusterName = 'ksqldb-cluster'
const ksqlDbCluster = new KsqlDbCluster(ksqlDbClusterName)

this._clusterName

import * as gcp from "@pulumi/gcp";
import * as pulumi from "@pulumi/pulumi";

export class NginxWebserver {
    public readonly instance: gcp.compute.Instance;
    public readonly instanceAddress: pulumi.Output<string>;

    constructor(name: string, machineType: string, imageName: string, network: gcp.compute.Network) {

        //virtual machine running nginx via a [startup script](<https://cloud.google.com/compute/docs/startupscript>)
        const script =
            `#!/bin/bash
apt -y update
apt -y install nginx`;

        const address = new gcp.compute.Address(`${name}`);
        
        this.instance = new gcp.compute.Instance(`${name}`, {
            machineType: `${machineType}`,
            bootDisk: {
                initializeParams: {
                    image: `${imageName}`,
                },
            },
            networkInterfaces: [{
                network: network.id,
                accessConfigs: [{
                    natIp: address.address
                }]
            }],
            metadataStartupScript: script,
        });
        
        this.instanceAddress = address.address;
    }
}

private readonly _clusterName: string

    constructor(clusterName: string) {
        console.log("CONSTRUCTOR:" + clusterName)
        this._clusterName = clusterName
    }

Once you have confirmed the status of the interrupted operations, you can repair your stack
using 'pulumi stack export' to export your stack to a file. For each operation that succeeded,
remove that operation from the "pending_operations" section of the file. Once this is complete,
use 'pulumi stack import' to import the repaired stack.

refusing to proceed

_k8nCluster

public Class KsqlDbCluster {
  private final String clusterName;
  // This is not legal in Java either regardless of where you position this.
  private final String k8sCluster = this.buildCluster(this.clusterName);

  public KSqlDbCluster(String clusterName) {
    this.clusterName = clusterName;
    // This is fine. But at this point, do you want the class member clusterName at all? :)
    this.k8sCluster = this.buildCluster(this.clusterName);
  }
}