StringBuilder sb=new StringBuilder(); StringBuilder sb2=new StringBuilder(); for(int i=0;i<num1;i++){ sb.append(n+""); } //System.out.println(sb.toString()); for(int i=0;i<num2;i++){ sb2.append(m+""); } //System.out.println(sb2.toString()); if(sb.length()==sb2.length()){ if((sb.toString().compareTo(sb2.toString())==0)){ System.out.println("Equal"); }else if(sb.toString().compareTo(sb2.toString())>0){ System.out.println("Greater"); }else{ System.out.println("Less"); } }else if(sb.length()>sb2.length()){ System.out.println("Greater"); }else{ System.out.println("Less"); } 第一题套用API，稳稳地，很幸福