{"id":104839,"date":"2025-04-06T13:54:41","date_gmt":"2025-04-06T09:24:41","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/day-16-java-variables-comprehensive-documentation-5271\/"},"modified":"2025-04-06T13:54:41","modified_gmt":"2025-04-06T09:24:41","slug":"day-16-java-variables-comprehensive-documentation-5271","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/day-16-java-variables-comprehensive-documentation-5271\/","title":{"rendered":"\u0631\u0648\u0632 16: \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u062c\u0627\u0648\u0627: \u0645\u0633\u062a\u0646\u062f\u0627\u062a \u062c\u0627\u0645\u0639"},"content":{"rendered":"
\n

1) \u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u062a\u0639\u0631\u06cc\u0641:<\/strong>
\u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u0638\u0631\u0648\u0641 \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062f\u0627\u062f\u0647 \u0631\u0627 \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u0627\u062c\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u062f\u0631 \u062d\u0627\u0641\u0638\u0647 \u0630\u062e\u06cc\u0631\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n

2) \u0637\u0628\u0642\u0647 \u0628\u0646\u062f\u06cc \u0645\u062a\u063a\u06cc\u0631\u0647\u0627<\/strong>
A. \u0628\u0631 \u0627\u0633\u0627\u0633 \u0646\u0648\u0639 \u062f\u0627\u062f\u0647
1) \u0627\u0646\u0648\u0627\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0627\u0648\u0644\u06cc\u0647<\/p>\n

\n
Data Type   Default Value   Size (bits) Range\/Example\nbyte    0   8   -128 to 127\nshort   0   16  -32,768 to 32,767\nint 0   32  -2\u00b3\u00b9 to 2\u00b3\u00b9-1\nlong    0L  64  -2\u2076\u00b3 to 2\u2076\u00b3-1\nfloat   0.0f    32  3.4e-038 to 3.4e+038\ndouble  0.0d    64  1.7e-308 to 1.7e+308\nchar    '\\u0000'    16  'A', '1', '$'\nboolean false   1 (JVM-dependent)   true or false\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
2) \u0627\u0646\u0648\u0627\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u063a\u06cc\u0631 \u062d\u0633\u0627\u0633 (\u0645\u0631\u062c\u0639)<\/p>\n
\n
Data Type   Default Value   Example\nString  null    \"Hello\"\nArrays  null    int[] arr = {1, 2, 3};\nClasses null    Tourist tourist = new Tourist();\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
3) \u062f\u0627\u0645\u0646\u0647 \u0645\u062a\u063a\u06cc\u0631<\/strong>
\u0627\u0644\u0641) \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0645\u062d\u0644\u06cc<\/p>\n
\n
Declared inside methods\/constructors\/blocks.\nNo default value (must be initialized before use).\nLifetime: Exists only while the method executes.\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u062b\u0627\u0644:<\/p>\n
\n
public void calculate() {\n    int localVar = 10; \/\/ Local variable (must be initialized)\n    System.out.println(localVar);\n}\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
B. \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u062c\u0647\u0627\u0646\u06cc (\u0632\u0645\u06cc\u0646\u0647 \u0647\u0627)<\/p>\n
\n
Declared inside a class, outside methods.\nHave default values (if not initialized).\n\nTwo types:\n    Static (static keyword) \u2192 Class-level (shared).\n    Non-Static (no keyword) \u2192 Instance-level (object-specific).\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u062b\u0627\u0644:<\/p>\n
\n
public class Tourist {\n    static int globalStaticVar = 1000; \/\/ Static (class-level)\n    int globalNonStaticVar = 500;      \/\/ Non-static (instance-level)\n}\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
4) \u0645\u0642\u0627\u062f\u06cc\u0631 \u067e\u06cc\u0634 \u0641\u0631\u0636<\/strong><\/p>\n
\n
Variable Type   Default Value\nGlobal (Static\/Non-Static)  Yes (e.g., 0, null)\nLocal   No (Compiler Error if Uninitialized)\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0633\u0648\u0627\u0644 \u0645\u0635\u0627\u062d\u0628\u0647:
\u2753 “\u0622\u06cc\u0627 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0645\u062d\u0644\u06cc \u0645\u0642\u0627\u062f\u06cc\u0631 \u067e\u06cc\u0634 \u0641\u0631\u0636 \u062f\u0627\u0631\u0646\u062f\u061f”
\u27a1 \u0646\u0647! \u0641\u0642\u0637 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u062c\u0647\u0627\u0646\u06cc \u0645\u0642\u0627\u062f\u06cc\u0631 \u067e\u06cc\u0634 \u0641\u0631\u0636 \u0631\u0627 \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n
5) \u062f\u0631\u06af\u06cc\u0631\u06cc \u0647\u0627\u06cc \u0646\u0627\u0645\u06af\u0630\u0627\u0631\u06cc \u0645\u062a\u063a\u06cc\u0631<\/strong>
\u0645\u0648\u0631\u062f 1): \u0645\u062a\u063a\u06cc\u0631 \u0645\u062a\u063a\u06cc\u0631 \u0645\u062d\u0644\u06cc \u0645\u062a\u063a\u06cc\u0631 \u062c\u0647\u0627\u0646\u06cc<\/p>\n
\n
If a local variable has the same name as a global variable, the local variable takes precedence.\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u062b\u0627\u0644:<\/p>\n
\n
public class Tourist {\n    static int amount = 100000; \/\/ Global static\n\n    public void havingDinner() {\n        int amount = 2000; \/\/ Local variable (shadows global)\n        System.out.println(amount); \/\/ Prints 2000 (local)\n    }\n\n    public static void main(String[] args) {\n        System.out.println(Tourist.amount); \/\/ 100000 (global)\n        Tourist t = new Tourist();\n        t.havingDinner(); \/\/ 2000 (local)\n    }\n}\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0645\u0648\u0631\u062f 2): \u062f\u0633\u062a\u0631\u0633\u06cc \u0628\u0647 \u0645\u062a\u063a\u06cc\u0631 \u062c\u0647\u0627\u0646\u06cc \u062f\u0631 \u062f\u0627\u062e\u0644 (\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u06cc\u0646 \u0628\u0631\u0627\u06cc \u063a\u06cc\u0631 \u0627\u0633\u062a\u0627\u062a\u06cc\u06a9)<\/p>\n
\n
public class Example {\n    int value = 100; \/\/ Non-static global\n\n    public void printValue() {\n        int value = 50; \/\/ Local variable\n        System.out.println(value); \/\/ 50 (local)\n        System.out.println(this.value); \/\/ 100 (global)\n    }\n}\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
6) \u0628\u0647\u062a\u0631\u06cc\u0646 \u0631\u0648\u0634\u0647\u0627<\/strong><\/p>\n
\u2714 \u0627\u0632 \u0646\u0627\u0645\u0647\u0627\u06cc \u0645\u0639\u0646\u06cc \u062f\u0627\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f (\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u060c \u06a9\u0627\u0631\u0628\u0631 \u0628\u0647 \u062c\u0627\u06cc A).
\u2714 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u0631\u0627 \u0642\u0628\u0644 \u0627\u0632 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 (\u0628\u0647 \u062e\u0635\u0648\u0635 \u0645\u062d\u0644\u06cc) \u0627\u0648\u0644\u06cc\u0647 \u06a9\u0646\u06cc\u062f.
\u2714 \u0627\u0632 \u0633\u0627\u06cc\u0647 \u0632\u062f\u0646 \u062e\u0648\u062f\u062f\u0627\u0631\u06cc \u06a9\u0646\u06cc\u062f \u0645\u06af\u0631 \u0627\u06cc\u0646\u06a9\u0647 \u0644\u0627\u0632\u0645 \u0628\u0627\u0634\u062f (\u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u0631\u0627 \u06a9\u0627\u0647\u0634 \u062f\u0647\u062f).
\u2714 \u0628\u0631\u0627\u06cc \u062b\u0627\u0628\u062a \u0647\u0627\u06cc \u06a9\u0644\u0627\u0633 \u0627\u0632 \u0627\u0633\u062a\u0627\u062a\u06cc\u06a9 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f (\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u060c \u062f\u0648 \u0628\u0631\u0627\u0628\u0631 \u0646\u0647\u0627\u06cc\u06cc \u0627\u0633\u062a\u0627\u062a\u06cc\u06a9 PI = 3.14 \u061b).<\/p>\n
\n
Summary Table\nFeature Local Variables Global Variables\nScope   Inside method\/block Class-level\nDefault Value   \u274c No (must initialize)    \u2714 Yes\nLifetime    Method execution    Entire program (static) \/ Object lifetime (non-static)\nShadowing   Can override global Can be accessed via ClassName.staticVar or this.nonStaticVar\n<\/code><\/pre>\n
\n
\n    \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u06cc\u0646 \u0645\u0633\u062a\u0646\u062f\u0627\u062a \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u062f\u0631 \u062c\u0627\u0648\u0627 \u0631\u0627 \u0628\u0647 \u0637\u0648\u0631 \u062c\u0627\u0645\u0639 \u060c \u0627\u0632 \u062c\u0645\u0644\u0647 \u0627\u0646\u0648\u0627\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627 \u060c \u062f\u0627\u0645\u0646\u0647 \u060c \u0646\u0627\u0645\u06af\u0630\u0627\u0631\u06cc \u062f\u0631\u06af\u06cc\u0631\u06cc \u0648 \u0628\u0647\u062a\u0631\u06cc\u0646 \u0634\u06cc\u0648\u0647 \u0647\u0627 \u062f\u0631 \u0628\u0631 \u0645\u06cc \u06af\u06cc\u0631\u062f.<\/p>\n
\u062a\u0648\u062c\u0647: \u0642\u0627\u0644\u0628 \u0628\u0646\u062f\u06cc \u0648 \u0633\u0627\u062e\u062a\u0627\u0631 \u0628\u0631\u0627\u06cc \u0648\u0636\u0648\u062d \u0628\u0627 \u06a9\u0645\u06a9 AI \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0634\u062f\u0646\u062f.<\/p>\n
—————————– \u067e\u0627\u06cc\u0627\u0646 \u0648\u0628\u0644\u0627\u06af ————————————-<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
1) \u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u062a\u0639\u0631\u06cc\u0641:\u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u0638\u0631\u0648\u0641 \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0645\u0642\u0627\u062f\u06cc\u0631 \u062f\u0627\u062f\u0647 \u0631\u0627 \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u0627\u062c\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u062f\u0631 \u062d\u0627\u0641\u0638\u0647 \u0630\u062e\u06cc\u0631\u0647 \u0645\u06cc \u06a9\u0646\u0646\u062f. 2) \u0637\u0628\u0642\u0647 \u0628\u0646\u062f\u06cc \u0645\u062a\u063a\u06cc\u0631\u0647\u0627A. \u0628\u0631 \u0627\u0633\u0627\u0633 \u0646\u0648\u0639 \u062f\u0627\u062f\u06471) \u0627\u0646\u0648\u0627\u0639 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0627\u0648\u0644\u06cc\u0647 Data Type Default Value Size (bits) Range\/Example byte 0 8 -128 to 127 short 0 16 -32,768 to 32,767 int 0 32 -2\u00b3\u00b9 to 2\u00b3\u00b9-1 …<\/p>\n","protected":false},"author":2,"featured_media":104840,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-104839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/104839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=104839"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/104839\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/104840"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=104839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=104839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=104839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}