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Java static methodのメリット

  • インスタンス化しなくて使用できる。
  • クラス内で共用なメソッドになるため、他のメソッドからアクセスが可能になる。
class TestClass {

    private TestClass(){
    }

    // staticメソッド
    public static void printlnHelloWorld() {
        System.out.println("Hello World!");
    }
}

staticメソッドの利用

public class HelloWorld {
    public static void main(String[] args) {
        TestClass.printlnHelloWorld(); //インスタンス化不要
    }
}
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