name:"Hello World" description:"Greet someone and record the time" inputs: who-to-greet:# id of input description:"Who to greet" required:true default:"World" outputs: time:# id of output description:"The time we we greeted you" runs: using:"node12" main:"src/index.js"
try { // `who-to-greet` input defined in action metadata file const nameToGreet = core.getInput("who-to-greet"); console.log(`Hello ${nameToGreet}!`); const time = newDate().toTimeString(); core.setOutput("time", time); // Get the JSON webhook payload for the event that triggered the workflow const payload = JSON.stringify(github.context.payload, null, 2); console.log(`The event payload: ${payload}`); } catch (error) { core.setFailed(error.message); }
描述文件说明了 action 的 输入、输出、以及从哪开始运行 action。要注意的是, main 的路径是相对于 action.yml 文件，而不是相对根目录。
使用 action
在 .github/workflows/main.yml 创建一个 workflow
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on:[push]
jobs: hello_world_job: runs-on:ubuntu-latest name:Ajobtosayhello steps: # To use this repository's private action, you must check out the repository - name:Checkout uses:actions/checkout@v2 - name:Helloworldactionstep uses:./actions/release id:hello with: who-to-greet:"Mona the Octocat" # Use the output from the `hello` step - name:Gettheoutputtime run:echo"The time was ${{ steps.hello.outputs.time }}"
* @return The {@code Class} object that represents the runtime * classofthisobject. publicfinalnativeClass<?> getClass();
从源码中可以看到 getClass 是 final 方法，无法被继承。同时是 native 方法。即其他语言例如 C 与 C++ 实现的方法。结果为对象的运行时 Class 对象。
举个例子
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package im.yfd.demo; classA{ }
classBextendsA{ }
classTest{ publicstaticvoidmain(String[] args){ A a = new A(); A b = new B(); System.out.println(a.getClass()); System.out.println(b.getClass()); a = b; System.out.println(a.getClass()); } }
publicclassPerson{ Person(String name) { this.name = name; } private String name; @Override publicbooleanequals(Object object){ if (this == object) { returnfalse; } if (object == null || object.getClass() != this.getClass()) { returnfalse; } Person p = (Person) object; if (p.name == null) { returnthis.name == null; } return p.name.equals(this.name); } }
classTest{ publicstaticvoidmain(String[] args)throws CloneNotSupportedException { Person a = new Person("name"); Person b = new Person("name"); Map<Person, String> map = new HashMap<>(); map.put(a, "a"); System.out.println(a.equals(b)); System.out.println(map.get(a)); System.out.println(map.get(b)); } }
class Test { public static void main(String[] args) throws CloneNotSupportedException { Test test = new Test(); Test testClone = (Test) test.clone(); } }
会报错 Exception in thread "main" java.lang.CloneNotSupportedException。
publicstaticvoidmain(String[] args)throws CloneNotSupportedException { Test test = new Test(); test.name = "1"; System.out.println("test 1"); System.gc(); test = new Test(); System.gc(); System.out.println("test 2"); } }
