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class Class0401

c. str. num. msg. Hello World!. class Class0401. class Class0402 { private String str; public int num;. public static void main(String args) { Class0402 c = new Class0402(“Hello World!”); c.message(); c.num = 250; int i = c.calculate(20);

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class Class0401

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  1. c str num msg Hello World! class Class0401 class Class0402 { private String str; public int num; public static void main(String args) { Class0402 c = new Class0402(“Hello World!”); c.message(); c.num = 250; int i = c.calculate(20); System.out.println(i); } Class0402(String msg) { System.out.println(“オブジェクトが…”); str = msg; } コピー オブジェクト　Class0402 オブジェクトが生成されました。 Class0402(String msg) { System.out.println(“オブジェクトが…”); str = msg; } Hello World!

  2. c str num class Class0401 class Class0402 { public static void main(String args) { Class0402 c = new Class0402(“Hello World!”); c.message(); c.num = 250; int i = c.calculate(20); System.out.println(i); } void message() { System.out.println(str); } オブジェクト　Class0402 Hello World! 250 オブジェクトが生成されました。 void message() { System.out.println(str); } Hello World!

  3. c str num i n 20 class Class0401 class Class0402 { public static void main(String args) { Class0402 c = new Class0402(“Hello World!”); c.message(); c.num = 250; int i = c.calculate(20); System.out.println(i); } Int calculate(int n) { num += n; return num; } オブジェクト　Class0402 Hello World! 270 270 250 オブジェクトが生成されました。 Hello World! Int calculate(int n) { num += n; return num; } 270

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