Page History

...

Code Block

bgColor	#FFcccc

class Vector {
  private int val = 1;

  public boolean isEmpty() {
    if (val == 1) {   // compares with 1 instead of 0
      return true;
    } else {
      return false;
    }
  }
  // other functionality is same as java.util.Vector
}

// import java.util.Vector; omitted

public class VectorUser {
  public static void main(String[] args) {
    Vector v = new Vector();
    if (v.isEmpty()) {
      System.out.println("Vector is empty");
    }
  }
}

...

Wiki Markup

When the developer and organization control the original shadowed class, it may be preferable to change the design strategy of the original in accordance with Bloch's _Effective Java_ \[[Bloch 2008|AA. Bibliography#Bloch 08]\], Item 16, _Prefer interfaces to abstract classes_. Changing the original class into an interface would permit class {{MyVector}} to declare that it implements the hypothetical {{Vector}} interface. This would permit client code that intended to use {{MyVector}} to remain compatible with code that uses the original implementation of {{Vector}}.

...

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="44c9c130637f7178-2fd91159-4ded41fa-be14a789-12bff9ce2157d34617dd6783"><ac:plain-text-body><![CDATA[	[[JLS 2005	AA. Bibliography#JLS 05]]	[§6.3.2, Obscured Declarations	http://java.sun.com/docs/books/jls/third_edition/html/names.html#6.3.2]	]]></ac:plain-text-body></ac:structured-macro>
	§6.3.1, Shadowing Declarations
	§7.5.2, Type-Import-on-Demand Declaration
	§14.4.3, Shadowing of Names by Local Variables
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="0c8fd7efeddbab29-93ddb61f-4e1b4cac-95679121-79c8affa81326a9176fbe179"><ac:plain-text-body><![CDATA[	[[FindBugs 2008	AA. Bibliography#FindBugs 08]]	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="e48454382d81972d-1d0e50a1-48694024-8c6087c9-e185b117ed4fc1ee4c5cc2c5"><ac:plain-text-body><![CDATA[	[[Bloch 2005	AA. Bibliography#Bloch 05]]	Puzzle 67, All strung out	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="bf9e4de72ca6b300-debd1d12-42cf48c2-9ee88acf-a15dcf019fe2788b46443a05"><ac:plain-text-body><![CDATA[	[[Bloch 2008	AA. Bibliography#Bloch 08]]	Item 16, Prefer interfaces to abstract classes	]]></ac:plain-text-body></ac:structured-macro>

...

Space shortcuts

Page tree

Versions Compared

Old Version 26

New Version 27

Key