数组组合问题,罗辑高手请进

[jackyluck]

假设一组数字数组:
ArrayList numbers= new ArrayList();
假设里面有25个数字:
numbers.add(1),numbers.add(2),numbers.add(3).......
如果我以7个数字为一组地组合（数字在numbers取出），组合出来的数组不重如何做?请高手帮帮我，谢谢!
例如:
1,2,3,4,5,6,7为一组,2,4,5,6,7,8,9又一组

[zapdos]

类似这样？
C:\java>java test
1
2
3
4
5
12
13
14
15
23
24
25
34
35
45
123
124
125
134
135
145
234
235
245
345
1234
1235
1245
1345
2345
12345

/*import java.util.regex.*;
public class test{
public static void main(String args[]){
    String str = "[Sun Aug 19 06:59:49 2007] [error] [client 192.168.34.36] File does not exist: /var/www/html/favicon.ico ";
    Pattern p = Pattern.compile("\\[(.*?)\\]\\s*\\[(.*?)\\]\\s*\\[(.*?)\\]\\s*(.*)$");
    Matcher m = p.matcher(str);
    while (m.find()) {
      System.out.println(m.group(1));
      System.out.println(m.group(2));
      System.out.println(m.group(3));
      System.out.println(m.group(4));
    }
    }
    }
    */
public class test{
  private String[] string;
  private int strLength = 0,current=0;
  private boolean[] list;
  public test(String string){
    this.string = new String[string.length()];
    for(int i=0;i<string.length();i++)
      this.string[i] = i==string.length()?string.substring(i):string.substring(i,i+1);
    list = new boolean[this.string.length];
    run();
  }
  private void run(){
    for(int i=1;i<=string.length;i++){
      strLength++;
      result(0,list);
    }
  }
  private void result(int start,boolean[] listarr){
    if(current==strLength){
      for(int i=0;i<listarr.length;i++)
        System.out.print((listarr[i]?string[i]:"")+(i==listarr.length-1?"\n":""));
    }else{
      for(int i=start;i<string.length;i++){
        boolean[] temp = listarr.clone();
        temp[i] = true;
        current++;
        result(i+1,temp);
        current--;
      }
    }
  }
  public static void main(String args[]){
    new test("12345");
  }
}

[zapdos]

改了一改，应该符合要求了

public class test{
  private String[] string;
  private int strLength = 7,current=0;
  private boolean[] list;
  private StringBuffer sb = new StringBuffer();
  public test(String string){
    this.string = string.split("");
    list = new boolean[this.string.length];
    result(1);
    System.out.println(sb);
  }
  private void result(int start){
    if(current==strLength)
      for(int i=0;i<list.length;i++)
        sb.append((list[i]?string[i]:"")+(i==list.length-1?"\n":""));
    else
      for(int i=start;i<string.length;i++){
        list[i] = true;
        current++;
        result(i+1);
        current--;
        list[i] = false;
      }
  }
  public static void main(String args[]){
    new test("123456789");
  }
}

C:\java>java test
1234567
1234568
1234569
1234578
1234579
1234589
1234678
1234679
1234689
1234789
1235678
1235679
1235689
1235789
1236789
1245678
1245679
1245689
1245789
1246789
1256789
1345678
1345679
1345689
1345789
1346789
1356789
1456789
2345678
2345679
2345689
2345789
2346789
2356789
2456789
3456789