Remove Repeatjava
1、去重原理算法
一、進行排序數組
二、判斷是否知足 '兩個字符串相同' 的條件,相同則累加劇複次數,並使用continue繼續下一次循環優化
三、當條件不知足時,將該字符串和累計數加入數組中,並重置累計值。spa
2、源碼code
一、好久以前寫的,我就很少說了。blog
import java.util.ArrayList; import java.util.List; //一個去重的算法,寫的有點複雜,沒有優化過 public class RemoveRepeat { public static void main(String[] args) { String[] array = {"a","a","b","c","c","d","e","e","e","f","f","f", "dagds", "dagds"}; List<String> strs = removeRepeat(array); for (String string : strs) { System.out.print(string+" "); } } public static List<String> removeRepeat(String[] array) { List<String> strs = new ArrayList<String>(); for(int i = 0; i<array.length; i++) { int count = 1; for(int j = i+1; j < array.length; j++) { if(array[i] == array[j]) { count++; } if(array[i] != array[j] || j == array.length-1) { strs.add(array[i]); strs.add(String.valueOf(count)); if(j!=array.length-1) { i = j-1; }else{ i=array.length-1; } break; } } } return strs; } }
二、優化後的,其實就只有中間的8行代碼。排序
import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class RemoveRepeatArray { public static void main(String[] args) { String[] sourceArray = { "a", "b", "a", "c", "b", "d", "d", "rsad", "b", "c", "rasdf" }; List<String> arrays = removeRepeat(sourceArray); for (int i = 0; i < arrays.size(); i++) { System.out.print(arrays.get(i) + " "); } } public static List<String> removeRepeat(String[] sourceArray) { List<String> arrays = new ArrayList<String>(); sourceArray = getSort(sourceArray); // 排序, Arrays.sort();不支持對字符串數組進行排序,因此本身寫了個簡單的排序 System.out.println(Arrays.toString(sourceArray)); int count = 1; for (int i = 0; i < sourceArray.length; i++) { //這裏多加了一個條件,防止數組下標越界異常 if (i < sourceArray.length - 1 && sourceArray[i].equals(sourceArray[i + 1])) { count++; continue; } arrays.add(sourceArray[i]); arrays.add(String.valueOf(count)); count = 1; } return arrays; } public static String[] getSort(String[] arrays) { for (int i = 0; i < arrays.length - 1; i++) { for (int j = 0; j < arrays.length - 1 - i; j++) { if (arrays[j].compareTo(arrays[j + 1]) > 0) { String temp = arrays[j]; arrays[j] = arrays[j + 1]; arrays[j + 1] = temp; } } } return arrays; } }
3、後記rem
一、有錯誤請指教,謝謝。字符串
二、轉發請註明出處。