Huawei-on Practice--repetitive character filtering

Title:

1. Write a string filter program, if you use multiple identical characters in the string, the characters first appear in non-filtered,.

2. For example, the string "ABACACDE" Filter Results to "ABCDE".
   

1. Demo Sample
2. input: "DEEFD" Output: "Def"
3. input: "AFAFAFAF" Output: "AF"
4. input: "PPPPPPPP" Output: "P"
   

Analysis: See similar filtering of the same characters like this. In Java, the first thing we think about is the set, which is a collection that effectively handles the repeated elements. The next step is the order problem, which is to keep the characters in their original order, so we have to choose a class that implements set to store the characters. Yes, Linkedhashset can solve our problems very well. And the next thing to do is write the program.

The code is as follows:

Package com.wenj.test;

Import Java.util.Iterator;
Import Java.util.LinkedHashSet;
Import Java.util.Set;

/**
Topic

Please write a string filter program. If more than one of the same characters appears in the string, the characters that are not first appear are filtered out.
For example, the string "ABACACDE" Filter Results to "ABCDE".

Demo sample
Input: "DEEFD" Output: "Def"
Input: "AFAFAFAF" Output: "AF"
Input: "PPPPPPPP" Output: "P"
* @author wenj91-pc
*
*/
public class Teststrfilter {

public static void Main (String args[]) {
String Strin = "PPPPPPPP";
Teststrfilter ts = new Teststrfilter ();
System.out.println (Ts.strfilter (Strin));
}

public string strfilter (string strin) {
String strtemp = Strin;
char[] str2c = Strtemp.tochararray ();

Set<character> cs = new linkedhashset<character> ();
for (int i=0; i<str2c.length; i++) {//Use set for character filtering
Cs.add (Str2c[i]);
}

String temp = "";
For (iterator<character> it=cs.iterator (); It.hasnext ();) {//once again combining strings
Temp + = It.next ();
}

return temp;
}
}

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Huawei-on Practice--repetitive character filtering