{"id":23004,"date":"2022-11-23T02:39:46","date_gmt":"2022-11-22T21:09:46","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-java-how-to-have-global-values-inside-a-class\/"},"modified":"2022-11-23T02:39:46","modified_gmt":"2022-11-22T21:09:46","slug":"solved-java-how-to-have-global-values-inside-a-class","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-java-how-to-have-global-values-inside-a-class\/","title":{"rendered":"[Solved] Java: how to have global values inside a class?"},"content":{"rendered":"

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I guess you are looking for something like this:<\/p>\n

public class TestClass {\n    public final String hallo;\n    public static final String halloSecond = \"Saluto!\";\n\n    TestClass(String hello){\n        String hallo = hello;\n    }\n\n    public static void main(String[] args) {\n        TestClass test = new TestClass(\"Tjena!\");\n        System.out.println(\"I want \"Tjena!\": \" + test.hallo);\n        TestClass testSecond = new TestClass(\"1\");\n        System.out.println(\"I want Saluto!:\" + test.halloSecond);\n        System.out.println(\"I want Saluto!:\" + testSecond.halloSecond);\n    }\n}\n<\/code><\/pre>\n
The value of hallo<\/code> is set in each instance of TestClass<\/code>. The value of halloSecond<\/code> is a constant, shared by all instances of the class and visible for the whole app. Note that with this code your IDE\/compiler probably gives you a warning upon test.halloSecond<\/code> – it should be qualified by the class name, like TestClass.halloSecond<\/code>, rather than an instance name.<\/p>\n
Update on global variables:<\/strong> the main problem with global variables is that they make the code<\/p>\n