請JAVA高手給予指教,文件內搜尋字串的問題

看板java作者SST2000 (BMW 428i)時間4年前 (2020/01/20 13:43)推噓0(0推 0噓 3→)

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請各位JAVA高手給予指教下面是我想出來的在文件內找尋想要的字串並且統計次數~~~請問有人有更好更方便的方法可以給予指點嗎??? package IOTESTDemo; import java.io.IOException; import java.io.FileReader; import java.io.IOException; import java.util.*; import java.util.Arrays; import java.text.ParseException; public class IODEMOTEST { public static void main(String[] args) throws IOException { ArrayList<Integer> arrayList = new ArrayList<Integer>(); FileReader fr = new FileReader("fr.txt"); int counter=0; System.out.println("請輸入你要找尋的字串"); Scanner scanner = new Scanner(System.in); String ST=scanner.nextLine(); char[] charArray = {'a', 'b', 'c', 'd', 'e'}; String str2 = new String(charArray);//把字元陣列轉成字串 int[] chs = new int[30]; int ch; int count=0; while ((ch = fr.read()) != -1) { if ((ch != 32)) { arrayList.add(ch); if(ch==13) { arrayList.remove(arrayList.indexOf(13)); counter=counter+showString(arrayList,ST); System.out.println("counter=="+counter); } if(ch==10) { arrayList.remove(arrayList.indexOf(10)); counter=counter+showString(arrayList,ST); System.out.println("counter=="+counter); } } else { counter=counter+showString(arrayList,ST); System.out.println("一共有"+counter+"字串相符合"); // System.out.println("++++++++++++++++++++++++++++++++++++++++++++++++"); } } fr.close(); } //---------------------------------------------------------------------// public static String ArrayToString(String[] arr) { //直接呼叫function return Arrays.toString(arr); } public static char byteAsciiToChar(int ascii) { char ch = (char) ascii; return ch; } public static int showString(ArrayList<Integer> arrayList, String ST) { System.out.println("_________________________________________________"); System.out.println("arraysize is="+arrayList.size()); char[] CH = new char[arrayList.size()]; for (int loop = 0; loop < arrayList.size(); loop++) { CH[loop] = byteAsciiToChar(arrayList.get(loop)); } for (int loop = 0; loop < arrayList.size(); loop++) { System.out.print(CH[loop]); } System.out.println(); String str3 = new String(CH); System.out.println(str3.length()); System.out.println("arrayList裡面是 "+str3); String str4 =ST; arrayList.clear(); if(str4.equals(str3)) { System.out.println("======="+str4.equals(str3)); return 1; } return 0; } } -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 111.246.156.168 (臺灣) ※ 文章網址: https://www.ptt.cc/bbs/java/M.1579499026.A.67A.html