Java deletes array elements and deletes repeated array elements

To delete array elements and filter repeated array elements in java, We need to traverse the array and then remove the Array Based on the value or method we set. I will introduce it to you one by one.

Delete an array by means of list

The Code is as follows:

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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:

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<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; }