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  1. ...return b; } public void yourMethod2() { long[][] a; // 不需要 instantiate a = yourMethod(); } }

  2. ...reference global variables. - static lives before a class object is instantiated . usage: ClassA.variable = 1; It is generally used for ...

  3. ... an instance variable which is accessible from an instance, i.e. an object instantiated from the class. It is therefore not visible from a static method (such as...

  4. ...及課程資料。 ... Error Message. Publish failed to instantiate Template. Correction. Publish failed find class...

  5. 本身 jtable 都是一個 table object model。你可以改成以下: ** 假如 a2 是 jtable object int colcnt = a2.getColumnCount(); int rowcnt = a2.getRowCount(); for (int r = 0; r < rowcnt; r++ ) { for (int c = 0; c < colcnt; c++ ) { sheet...

  6. 11. Keywords () and () are access modifiers. private, public 12. Class members declared with access modifier () are accessible wherever the program has reference to an object of the class in which those members are defined...

  7. The art of asking questions that get responses is for people to understand your problem quickly. I think the best way to present your problem is to provide a link that shows the problem you were given...