🚀 go-pugleaf

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How can I use a HashTable with custom Objects as keys ?
In which way can I enforce the HashTable to use my own equals()-method
for the key's comparison ?

For an example:
class Key
{
    public int a;
    public int b;
    public Key(x,y){a=x;b=y;}
    public boolean equals(Key key)
    {
        return (a==key.a && b==key.b);
    }
}
...
hashTable.put(new Key(a0,b0),value);

Also when there exists a key with (a0,b0) this call to put() creates a
new key in the HashTable using the keys' object reference (?) for
comparison.
I want the custom method Key.equals() to be used.
How can I achieve this?


--



-Stephan Grimm-

<Stephan.Grimm@mgm-edv.de>
<grst0018@fh-karlsruhe.de>

GERMANY


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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
How can I use a HashTable with custom Objects as keys ?
<br>In which way can I enforce the HashTable to use my own equals()-method
for the key's comparison ?
<p>For an example:
<br><tt>class Key</tt>
<br><tt>{</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public int a;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public int b;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public Key(x,y){a=x;b=y;}</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public boolean equals(Key key)</tt>
<br><tt>&nbsp;&nbsp;&nbsp; {</tt>
<br><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return (a==key.a &amp;&amp;
b==key.b);</tt>
<br><tt>&nbsp;&nbsp;&nbsp; }</tt>
<br><tt>}</tt>
<br><tt>...</tt>
<br><tt>hashTable.put(new Key(a0,b0),value);</tt>
<p>Also when there exists a key with (a0,b0) this call to put() creates
a new key in the HashTable using the keys' object reference (?) for comparison.
<br>I want the custom method Key.equals() to be used.
<br>How can I achieve this?
<br>&nbsp;
<p>--
<br>&nbsp;
<br>&nbsp;
<p>-Stephan Grimm-
<p>&lt;Stephan.Grimm@mgm-edv.de>
<br>&lt;grst0018@fh-karlsruhe.de>
<p>GERMANY
<br>&nbsp;</html>

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