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Java code:
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public class AllSort
{
public static void main(String[] args) {
char buf[] = {'a','b','c'};
perm(buf, 0, buf.length -1);
}
public static void perm(char[] buf, int start, int end){
if(start == end){
for(int i = 0;i <= end; i++){
System.out.print(buf[i]);
}
System.out.println();
}else{
for(int i=start; i<=end; i++){
System.out.println("start: " + start + "-->"+buf[start]);
char temp = buf[start];
buf[start] = buf[i];
buf[i] = temp;
System.out.println("-"+buf[start]+&q
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import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
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