Question

有人可以帮我为什么不显示calculateCoin函数吗？基本上，它会计算出硬币，该硬币是在drawMap函数中随机生成的，概率为20％。

我做的但不确定是否正确的事情是，我在drawMap函数中调用了calculateCoin函数，然后在主体中调用了drawMap。

enter image description here

apiVersion: v1
items:
- apiVersion: v1
  kind: Pod
  metadata:
    annotations:
      checksum/config: 45cc44098254d90e88878e037f6eb5803be739890e26d9070e21ac0c0650debd
      kubectl.kubernetes.io/last-applied-configuration: |
        {"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{"checksum/config":"45cc44098254d90e88878e037f6eb5803be739890e26d9070e21ac0c0650debd","kubernetes.io/psp":"eks.privileged"},"creationTimestamp":"2019-10-30T15:49:57Z","generateName":"polling-telegraf-s-79f44d578f-","labels":{"app":"polling-telegraf-s","pod-template-hash":"79f44d578f"},"name":"polling-telegraf-s-79f44d578f-khdjf","namespace":"tick","ownerReferences":[{"apiVersion":"apps/v1","blockOwnerDeletion":true,"controller":true,"kind":"ReplicaSet","name":"polling-telegraf-s-79f44d578f","uid":"ec1e6988-fb2c-11e9-bdf2-02b7fbdf557a"}],"resourceVersion":"134887","selfLink":"/api/v1/namespaces/tick/pods/polling-telegraf-s-79f44d578f-khdjf","uid":"ec1fa8a5-fb2c-11e9-bdf2-02b7fbdf557a"},"spec":{"containers":[{"image":"telegraf:1.10.3-alpine","imagePullPolicy":"IfNotPresent","name":"polling-telegraf-s","resources":{"limits":{"cpu":"1","memory":"2Gi"},"requests":{"cpu":"100m","memory":"256Mi"}},"terminationMessagePath":"/dev/termination-log","terminationMessagePolicy":"File","volumeMounts":[{"mountPath":"/etc/telegraf","name":"config"},{"mountPath":"/var/run/utmp","name":"varrunutmpro","readOnly":true},{"mountPath":"/var/run/secrets/kubernetes.io/serviceaccount","name":"default-token-htxsr","readOnly":true}]}],"dnsPolicy":"ClusterFirst","enableServiceLinks":true,"nodeName":"ip-192-168-179-5.eu-west-2.compute.internal","priority":0,"restartPolicy":"Always","schedulerName":"default-scheduler","securityContext":{},"serviceAccount":"default","serviceAccountName":"default","terminationGracePeriodSeconds":30,"tolerations":[{"effect":"NoExecute","key":"node.kubernetes.io/not-ready","operator":"Exists","tolerationSeconds":300},{"effect":"NoExecute","key":"node.kubernetes.io/unreachable","operator":"Exists","tolerationSeconds":300}],"volumes":[{"hostPath":{"path":"/var/run/utmp","type":""},"name":"varrunutmpro"},{"configMap":{"defaultMode":420,"name":"polling-telegraf-s"},"name":"config"},{"name":"default-token-htxsr","secret":{"defaultMode":420,"secretName":"default-token-htxsr"}}]},"status":{"conditions":[{"lastProbeTime":null,"lastTransitionTime":"2019-10-30T15:49:57Z","status":"True","type":"Initialized"},{"lastProbeTime":null,"lastTransitionTime":"2019-10-30T15:49:58Z","status":"True","type":"Ready"},{"lastProbeTime":null,"lastTransitionTime":"2019-10-30T15:49:58Z","status":"True","type":"ContainersReady"},{"lastProbeTime":null,"lastTransitionTime":"2019-10-30T15:49:57Z","status":"True","type":"PodScheduled"}],"containerStatuses":[{"containerID":"docker://a66f40111474ea28d1b1b7adf6d9e0278adb6d6aefa23b345cc1559174018f27","image":"telegraf:1.10.3-alpine","imageID":"docker-pullable://telegraf@sha256:9106295bc67459633b4d6151c2e1b9949e501560b2e659fe541bda691c566bcf","lastState":{},"name":"polling-telegraf-s","ready":true,"restartCount":0,"state":{"running":{"startedAt":"2019-10-30T15:49:58Z"}}}],"hostIP":"192.168.179.5","phase":"Running","podIP":"192.168.159.179","qosClass":"Burstable","startTime":"2019-10-30T15:49:57Z"}}
      kubernetes.io/psp: eks.privileged
    creationTimestamp: "2019-10-30T15:49:57Z"
    generateName: polling-telegraf-s-79f44d578f-
    labels:
      app: polling-telegraf-s
      pod-template-hash: 79f44d578f
    name: polling-telegraf-s-79f44d578f-khdjf
    namespace: tick
    ownerReferences:
    - apiVersion: apps/v1
      blockOwnerDeletion: true
      controller: true
      kind: ReplicaSet
      name: polling-telegraf-s-79f44d578f
      uid: ec1e6988-fb2c-11e9-bdf2-02b7fbdf557a
    resourceVersion: "409255"
    selfLink: /api/v1/namespaces/tick/pods/polling-telegraf-s-79f44d578f-khdjf
    uid: ec1fa8a5-fb2c-11e9-bdf2-02b7fbdf557a
  spec:
    containers:
    - image: telegraf:1.10.3-alpine
      imagePullPolicy: IfNotPresent
      name: polling-telegraf-s
      resources:
        limits:
          cpu: "1"
          memory: 2Gi
        requests:
          cpu: 100m
          memory: 256Mi
      terminationMessagePath: /dev/termination-log
      terminationMessagePolicy: File
      volumeMounts:
      - mountPath: /etc/telegraf
        name: config
      - mountPath: /var/run/utmp
        name: varrunutmpro
        readOnly: true
      - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
        name: default-token-htxsr
        readOnly: true
    dnsPolicy: ClusterFirst
    enableServiceLinks: true
    nodeName: ip-192-168-179-5.eu-west-2.compute.internal
    priority: 0
    restartPolicy: Always
    schedulerName: default-scheduler
    securityContext: {}
    serviceAccount: default
    serviceAccountName: default
    terminationGracePeriodSeconds: 30
    tolerations:
    - effect: NoExecute
      key: node.kubernetes.io/not-ready
      operator: Exists
      tolerationSeconds: 300
    - effect: NoExecute
      key: node.kubernetes.io/unreachable
      operator: Exists
      tolerationSeconds: 300
    volumes:
    - hostPath:
        path: /var/run/utmp
        type: ""
      name: varrunutmpro
    - configMap:
        defaultMode: 420
        name: polling-telegraf-s
      name: config
    - name: default-token-htxsr
      secret:
        defaultMode: 420
        secretName: default-token-htxsr
  status:
    conditions:
    - lastProbeTime: null
      lastTransitionTime: "2019-10-30T15:49:57Z"
      status: "True"
      type: Initialized
    - lastProbeTime: null
      lastTransitionTime: "2019-10-30T15:49:58Z"
      status: "True"
      type: Ready
    - lastProbeTime: null
      lastTransitionTime: "2019-10-30T15:49:58Z"
      status: "True"
      type: ContainersReady
    - lastProbeTime: null
      lastTransitionTime: "2019-10-30T15:49:57Z"
      status: "True"
      type: PodScheduled
    containerStatuses:
    - containerID: docker://a66f40111474ea28d1b1b7adf6d9e0278adb6d6aefa23b345cc1559174018f27
      image: telegraf:1.10.3-alpine
      imageID: docker-pullable://telegraf@sha256:9106295bc67459633b4d6151c2e1b9949e501560b2e659fe541bda691c566bcf
      lastState: {}
      name: polling-telegraf-s
      ready: true
      restartCount: 0
      state:
        running:
          startedAt: "2019-10-30T15:49:58Z"
    hostIP: 192.168.179.5
    phase: Running
    podIP: 192.168.159.179
    qosClass: Burstable
    startTime: "2019-10-30T15:49:57Z"
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""

Answer 1

该函数实际上正在被调用，但是您从该函数返回的值未存储在任何变量中。如果您希望在打印地图后发生某些事情，请将调用结果存储在变量中，然后打印出来。

int calculatedCoin = calculateCoin(map, coin);
System.out.println("Calculated coin: " + calculatedCoin)

Answer 2

尝试一下，但是基本上您声明了类的类型而不是方法。

public class dave {
public static void main(String[] args) {
    dave main = new dave();
    System.out.println(dave.drawMap());
}

public static int[][] drawMap() {
    int[][] map = new int[5][5];
    char coin = 'o';

    for (int i = 0; i < map.length; i++) {
        for (int j = 0; j < map[i].length; j++) {
            map[i][j] = (int) (Math.random() * 10);
            if (map[i][j] < 2) {
                System.out.print(coin + " ");
            } else
                System.out.print("*" + " ");
        }
        System.out.println("");
    }

    calculateCoin(map, coin);
    System.out.println("");

    return map;
}

public static int calculateCoin(int[][] map, char coin) {
    int result = 0;
    for (int i = 0; i < map.length; i++) {
        for (int j = 0; j < map[i].length; j++) {
            if (map[i][j] == coin) {
                result++;
            }
        }
    }
    return result;
}

}

谁能告诉我为什么我的calculateCoin函数不显示？

2 个答案: