我用手机网页上的贴吧,你的图片我看不清楚.我给你看下我写的. public static void main(String[] args) { long l=8; for (long i=1;i < l;i++) { if (zhis(i)) { for (long ii=i + 1;ii < l;ii++) { if (zhis(ii)) { if (i + ii == l) { System.out.println(i + " " + ii); }}}}}} public static boolean zhis(long ll) { boolean b=true; if (ll == 1) b = true; else { for (long i=2;i < ll;i++) { if (ll % i == 0) b = false; }} return b; }