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| package algos; | |
| public class Permutation { | |
| private boolean[] used; | |
| private StringBuilder out = new StringBuilder(); | |
| private final String in; | |
| public Permutation( final String str ){ | |
| in = str; | |
| used = new boolean[ in.length() ]; | |
| } | |
| public void permute( ){ | |
| if( out.length() == in.length() ){ | |
| System.out.println( out ); | |
| return; | |
| } | |
| for( int i = 0; i < in.length(); ++i ){ | |
| if( used[i] ) continue; | |
| out.append( in.charAt(i) ); | |
| used[i] = true; | |
| permute(); | |
| used[i] = false; | |
| out.setLength( out.length() - 1 ); | |
| } | |
| } | |
| public static void main(String[] args) { | |
| Permutation ps = new Permutation("abc"); | |
| ps.permute(); | |
| } | |
| } |
