关于计算最长英语单词链的问题

要求：

例如， 文件里有：

Apple

Zoo

Elephant

Under

Fox

Dog

Moon

Leaf

Tree

最长的相连英语单词串为： apple - elephant – tree,

输出到文件里面，是这样的：

Apple Elephant Tree

package test_use_p;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class Action {
    public static void main(String[] args) throws IOException {
        String[] st = new String[20];
        String[] sf = new String[20];
        String[] ss = new String[20];
        
        String url = "input.txt";
        
        st = readWordT(url);
        sf = readWordF(url);
        ss = readWord(url);
        
        //BufferedWriter out = new BufferedWriter(new FileWriter("output.txt"));
        FileWriter writer = new FileWriter("output.txt");
        BufferedWriter out = new BufferedWriter(writer);

        int t = 0;
        int f = 0;
        int temp = 0;
        try {
            for(f = temp;f<20;f++) {
                for(t = temp;t<20;t++) {
                    if( sf[f].equals(st[t]) ) {
                        System.out.println(ss[++f]);                        
                        out.write(ss[++f]);
                    }
                }
            }
        }
        catch (Exception e){
            
        }
        
    }
    
    
    
    
    public static void read(int temp,String[] st,String[] sf,String[] ss) {
        int t = 0;
        int f = 0;
        
        for(f = temp;f<20;f++) {
            //System.out.println("fffffffffffffffff"+f);
            for(t = temp;t<20;t++) {
                //System.out.println("ttttttttttttttttttttt"+t);
                if( sf[f].equals(st[t]) ) {
                    System.out.println(ss[++f]);
                    temp = t;
                    
                }
            }
        }
    }
    
    
    @SuppressWarnings("resource")
    public static String[] readWordT(String url) throws IOException {
        String[] s = new String[20];
        int i = 0;
        
        
        BufferedReader br = new BufferedReader(new FileReader(url));
        BufferedReader brspace = new BufferedReader(new FileReader(url));
        int tempc, tempspace;//记录是否为字母或空格
        char c1, c2;//分别记录第一个单词的末尾，第二个单词的开头
        String s1, s2;
        
        
        brspace.read();//多读到下一个
        while( (tempc = br.read()) != -1) { 
            tempspace = brspace.read();
            
            if( (tempc >= 97 && tempc <= 122) && tempspace == 32) {//尾字母
                c1 = (char)tempc;
                s1 = String.valueOf(c1);
                //System.out.println(c1);
            }
            
            if(tempc == 32 && (tempspace >= 97 && tempspace <= 122) ) {//头字母
                c2 = (char)tempspace;
                s2 = String.valueOf(c2);
                //System.out.println(c2);
                
                s[i] = s2;//记录到头字符串数组中
                i++;
            }
            
        }
        
        
        return s;        
    }
    
    
    @SuppressWarnings("resource")
    public static String[] readWordF(String url) throws IOException {
        String[] s = new String[20];
        int i = 0;
        
        
        BufferedReader br = new BufferedReader(new FileReader(url));
        BufferedReader brspace = new BufferedReader(new FileReader(url));
        int tempc, tempspace;//记录是否为字母或空格
        char c1, c2;//分别记录第一个单词的末尾，第二个单词的开头
        String s1, s2;
        
        
        brspace.read();//多读到下一个
        while( (tempc = br.read()) != -1) { 
            tempspace = brspace.read();
            
            
            if( (tempc >= 97 && tempc <= 122) && tempspace == 32) {//尾字母
                c1 = (char)tempc;
                s1 = String.valueOf(c1);
                //System.out.println(c1);
                
                
                s[i] = s1;//记录到末尾字符串数组中
                i++;
            }
            
            if(tempc == 32 && (tempspace >= 97 && tempspace <= 122) ) {//头字母
                c2 = (char)tempspace;
                s2 = String.valueOf(c2);
                //System.out.println(c2);             
            }
            
        }
        
        
        return s;        
    }
    
    
    @SuppressWarnings("resource")
    public static String[] readWord(String url) throws IOException {
        String[] s = new String[20];
        int i = 0;    
        
        BufferedReader br = new BufferedReader(new FileReader(url));
        
        int tempc;//记录是否为字母或空格
        char c1;//分别记录第一个单词的末尾，第二个单词的开头
        String s1;
        String ss = "";
        
        while( (tempc = br.read()) != -1) {   
            if((tempc >= 97 && tempc <= 122)) {
                c1 = (char)tempc;
                s1 = String.valueOf(c1);                              
                ss = ss.concat(s1);                
            } 
            else if(tempc == 32) {
                
                s[i] = ss;
                i++;
                //System.out.println(ss);
                ss = "";
            }
        }    
        return s;        
    }
    
    
}