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Java deletes array elements and deletes repeated array elements

Source: Internet
Author: User
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Delete an array by means of list

The code is as follows: Copy code

Private String [] removePaths (String path, String [] srcpaths ){
List <String> list = new ArrayList <String> ();
Int k = srcpaths. length; // original string length
Int I = 0;
While (I <k ){
If (! Srcpaths [I]. equals (path )){
List. add (srcpaths [I]); // you can add it to the list without waiting.
   }
I ++;
  }
String [] temp = new String [list. size ()];
For (int j = 0; j <list. size (); j ++ ){
Temp [j] = list. get (j );
  }
  
Return temp;
  
 }

No compiler, just write it. That's what it means...

The code is as follows: Copy code

Private String [] removePaths (String path, String [] srcpaths ){
List list = Arrays. asList (srcpaths );
List. remove (path );
String [] temp = new String [list. size ()];
Return list. toArray (temp );
}

Delete the same element from the array

Sort the source array by default.

Adjacent identical elements

Then, perform a circular operation to delete the same element.

The code is as follows: Copy code

<Html>
<Body>

<Script type = "text/javascript">

Var source = ["Lin Chong", "Lu Zhishen", "Dai Zong", "Lin Chong", "Shi Qian", "Zhu Gui"];
Var target = new Array ();

Source. sort ();
Target. push (source [0]);

For (var I = 1; I <source. length; I ++)
{
If (source [I]! = Source [i-1])
{
Target. push (source [I]);
}
}

Document. write ('original array: '+ source + "<br/> ");
Document. write ('required array: '+ target );

</Script>

</Body>
</Html>

Add two more instances.

The code is as follows: Copy code
Public static void main (String [] args ){
GetDistinct (new int [] {6, 7, 3, 6, 5, 2, 7, 8 });
    }
Static void getDistinct (int array []) {
Java. util. List list = new java. util. ArrayList ();
For (int I = 0; I <array. length; I ++ ){
If (! List. contains (array [I]) {
List. add (array [I]);
System. out. print (array [I] + "");
    }
    }
    }
Output: 6 7 3 5 2 8

Take a look at the ArrayList contains () method source code:

The code is as follows: Copy code
 
Public boolean contains (Object elem ){
Return indexOf (elem)> = 0;
    }
Public int indexOf (Object elem ){
If (elem = null ){
For (int I = 0; I <size; I ++)
If (elementData [I] = null)
Return I;
} Else {
For (int I = 0; I <size; I ++)
If (elem. equals (elementData [I])
Return I;
    }
Return-1;
    }

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Related Keywords:
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