package yingyu; import java.io.File; import java.io.FileNotFoundException; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.util.Scanner; public class output { public static void main(String[] args) throws FileNotFoundException { File file = new File("D:\input.txt");// 读取文件 if (!file.exists()) {// 如果文件打不开或不存在则提示错误 System.out.println("您的D盘文件不存在"); return; }else { if(file.exists() && file.length() == 0) { System.out.println("您的D盘文件为空!"); return; } } long startTime = System.currentTimeMillis(); String[] strs=new String[1000000]; Scanner x = new Scanner(file); int i=0; boolean flag=false; while(x.hasNextLine()) { String[] str=x.nextLine().split("\W+"); for(int ms=0;ms<str.length;ms++) { if(!str[ms].equals("")&&str[ms].length()>2) { flag=false; // System.out.println(str[ms]); if(i!=0) { for(int t=0;t<i;t++) { if(!str[ms].equals(strs[t])) { flag=true; } } }else { flag=true; } if(flag) { strs[i]=str[ms]; i++; } } } } if(i==1) { System.out.println("该文件只有一个单词!无法实现词语接龙"); } String sentence = ""; String word=""; String max=""; for(int m=0;m<i;m++) { sentence = strs[m]; word = sentence; for(int j=m+1;j<i;j++) { if(strs[j].toLowerCase().subSequence(0, 1).equals(word.toLowerCase().subSequence(word.length()-1, word.length()))) { word = strs[j]; sentence+=" "+word; } } if(sentence.indexOf(" ")!=-1) { if(sentence.length()>max.length()) { max = sentence; } // System.out.println(sentence); } } FileWriter fw = null; try { //如果文件存在,则追加内容;如果文件不存在,则创建文件 File f=new File("D:\output.txt"); fw = new FileWriter(f, true); } catch (IOException e) { e.printStackTrace(); } PrintWriter pw = new PrintWriter(fw); long endTime = System.currentTimeMillis(); // System.out.println(endTime-startTime+"ms"); System.out.println(i); if(max.length()!=0) { //System.out.println(max); pw.print(max); pw.flush(); }else { System.out.println("没有首尾相连"); } } }
实现英语单词接龙