一个集合的所有子集的Java代码实现

import java.io.*; public class dddde { public void displaySubSet(int setN[]) { int length = setN.length; int i; try { BufferedWriter writer = new BufferedWriter(new FileWriter(new File( "d://Result.txt"))); for (i = 0; i < (1 << length); i++) { for (int j = 0; j < length; j++) { if ((i & (1 << j)) != 0) { writer.write("" + setN[j] + " "); } } writer.write("/r/n"); } writer.close(); } catch (Exception e) { } } public static void main(String[] args) { dddde ss = new dddde(); int setN[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; ss.displaySubSet(setN); } }