从字符数组java中“删除”重复空格
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【中文标题】从字符数组java中“删除”重复空格【英文标题】:"Removing" Duplicate spaces from a char array java 【发布时间】:2016-06-04 18:19:45 【问题描述】:我正在尝试创建一个方法,该方法将采用一个 char 数组,删除所有重复的空格(2 个或更多),然后将 '\u0000'
字符放在末尾,因为删除了许多空格以便数组长度很满意。我意识到我必须将元素向下移动,但这是我遇到麻烦的地方。我的程序在 2 个空格的情况下运行良好,但连续三个空格会使它失效。我理解为什么会发生这种情况,但我不知道如何解决它。我知道它源于代码characters[j] = characters[j+1]
,但我不知道如何修复它。
int duplicateCount = 0;
// Create a loop to read the element values
for(int i = 0; i + 1 < characters.length; i++)
// If the element is a space and the next one is a space
if(characters[i] == ' ' && characters[i+1] == ' ')
// Add to duplicate count and start shifting values down
duplicateCount++;
// *THIS IS WHERE I THINK BUG IS*
for(int j = i; j < characters.length - 1; j++)
characters[j] = characters[j+1];
// Replace characters at end with how many duplicates were found
for(int replace = characters.length - duplicateCount; replace < characters.length; replace++)
characters[replace] = '\u0000';
谢谢大家。
【问题讨论】:
参考这个***.com/questions/3958955/… 这对字符有效吗?最重要的是,数组?它似乎只适用于字符串 您希望将所有空格移到末尾。对吗? 正确,所有空格都将作为 \u0000 个字符出现在末尾span> 您的问题解决了吗? 【参考方案1】:据我了解,您希望从非空格字符之间删除所有空格并将 \u0000 添加到末尾。
如果是这个问题,试试这个:
我已经使用loops
和if
语句来实现它。
for (int i = 0; i < characters.length; i++)
int j =i+1;
if (characters[i] == ' ' || characters[i] == '\u0000' )
while (j<characters.length && (characters[j] == ' ' || characters[j] == '\u0000'))
j++; //increment j till a non-space char is found
if(j<characters.length && (characters[j] != ' ' || characters[j] != '\u0000'))
// to ensure that the control entered while
characters[i] = characters[j]; //swapping the values
characters[j] = '\u0000'; //giving value \u0000 to position j
【讨论】:
我删除了我的答案,因为你的回答更有帮助,更简单,所以+1 uv @PiyushGupta 你不应该删除那个。应该做出适当的更正。感谢您的支持!【参考方案2】:如果您想保留当前代码,非常简单的解决方案。 只需添加 1 行 i--。
int duplicateCount = 0;
// Create a loop to read the element values
for(int i = 0; i + 1 < characters.length; i++)
// If the element is a space and the next one is a space
if(characters[i] == ' ' && characters[i+1] == ' ')
// Add to duplicate count and start shifting values down
duplicateCount++;
// *THIS IS WHERE I THINK BUG IS*
for(int j = i; j < characters.length - 1; j++)
characters[j] = characters[j+1];
i--; // so that multiple space case can be handled
// Replace characters at end with how many duplicates were found
for(int replace = characters.length - duplicateCount; replace < characters.length; replace++)
characters[replace] = '\u0000';
【讨论】:
【参考方案3】: int count = 0; // Count of non-space elements
// Traverse the array. If element encountered is
// non-space, then replace the element at index 'count'
// with this element
for (int i = 0; i < n; i++)
if (arr[i] != '')
arr[count++] = arr[i]; // here count is
// incremented
// Now all non-space elements have been shifted to
// Make all elements '\u0000' from count to end.
while (count < n)
arr[count++] = 0;
【讨论】:
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