如何更换新线路
如何更换新线路
提问于 2015-03-22 20:42:35
不幸的是，我在更换新的台词时遇到了一些困难。
public class Example {
static String s = "73167176531330624919225119674426574742355349194934\n" +
"96983520312774506326239578318016984801869478851843\n" +
"85861560789112949495459501737958331952853208805511\n" +
"12540698747158523863050715693290963295227443043557\n" +
"66896648950445244523161731856403098711121722383113\n" +
"62229893423380308135336276614282806444486645238749\n" +
"30358907296290491560440772390713810515859307960866\n" +
"70172427121883998797908792274921901699720888093776\n" +
"65727333001053367881220235421809751254540594752243\n" +
"52584907711670556013604839586446706324415722155397\n" +
"53697817977846174064955149290862569321978468622482\n" +
"83972241375657056057490261407972968652414535100474\n" +
"82166370484403199890008895243450658541227588666881\n" +
"16427171479924442928230863465674813919123162824586\n" +
"17866458359124566529476545682848912883142607690042\n" +
"24219022671055626321111109370544217506941658960408\n" +
"07198403850962455444362981230987879927244284909188\n" +
"84580156166097919133875499200524063689912560717606\n" +
"05886116467109405077541002256983155200055935729725\n" +
"71636269561882670428252483600823257530420752963450".replaceAll("\\n", "");
public static void main(String[] args) {
System.out.println(s);
}
} 我想从字符串\n中删除所有出现的s。我试着在StackOverflow上查找答案，但每个帖子似乎都有不同的答案(而且它们都很复杂，很难记住)。
有什么简单的方法吗？
我也试过
replaceAll("\n", "")
replaceAll("\\\\n", "")
replaceAll(System.getProperty("line.separator"), "")
replaceAll("(\\r|\\n)", "")回答 3
Stack Overflow用户
回答已采纳
发布于 2015-03-22 20:52:17
"hello" + "world".replace("o","")是一样的
"hello" + ("world".replaceAll("o",""))因此，replaceAll只会影响字符串的最后一部分，在您的示例中是
"71636269561882670428252483600823257530420752963450".replaceAll("\\n", ""). 若要解决此问题，请使用括号首先将所有字符串部件连接起来，然后调用对结果字符串的替换。
static String s = (
"73167176531330624919225119674426574742355349194934\n" +
"96983520312774506326239578318016984801869478851843\n" +
"85861560789112949495459501737958331952853208805511\n" +
"12540698747158523863050715693290963295227443043557\n" +
"66896648950445244523161731856403098711121722383113\n" +
"62229893423380308135336276614282806444486645238749\n" +
"30358907296290491560440772390713810515859307960866\n" +
"70172427121883998797908792274921901699720888093776\n" +
"65727333001053367881220235421809751254540594752243\n" +
"52584907711670556013604839586446706324415722155397\n" +
"53697817977846174064955149290862569321978468622482\n" +
"83972241375657056057490261407972968652414535100474\n" +
"82166370484403199890008895243450658541227588666881\n" +
"16427171479924442928230863465674813919123162824586\n" +
"17866458359124566529476545682848912883142607690042\n" +
"24219022671055626321111109370544217506941658960408\n" +
"07198403850962455444362981230987879927244284909188\n" +
"84580156166097919133875499200524063689912560717606\n" +
"05886116467109405077541002256983155200055935729725\n" +
"71636269561882670428252483600823257530420752963450"
).replaceAll("\\n", "");但是，在我们不处理初始化字段的情况下，我更希望将这个“一行”拆分为更多的步骤，这些步骤将更容易读懂，而且您将避免问题中的错误：
//concatenation
String s = "....."
+"....."
:
+".....";
//modification
s = s.replaceAll("\\n","");Stack Overflow用户
发布于 2015-03-22 20:51:28
首先，当你在做
static String s = "73167176531330624919225119674426574742355349194934\n" +
"96983520312774506326239578318016984801869478851843\n" +
"85861560789112949495459501737958331952853208805511\n" +
"12540698747158523863050715693290963295227443043557\n" +
"66896648950445244523161731856403098711121722383113\n" +
"62229893423380308135336276614282806444486645238749\n" +
"30358907296290491560440772390713810515859307960866\n" +
"70172427121883998797908792274921901699720888093776\n" +
"65727333001053367881220235421809751254540594752243\n" +
"52584907711670556013604839586446706324415722155397\n" +
"53697817977846174064955149290862569321978468622482\n" +
"83972241375657056057490261407972968652414535100474\n" +
"82166370484403199890008895243450658541227588666881\n" +
"16427171479924442928230863465674813919123162824586\n" +
"17866458359124566529476545682848912883142607690042\n" +
"24219022671055626321111109370544217506941658960408\n" +
"07198403850962455444362981230987879927244284909188\n" +
"84580156166097919133875499200524063689912560717606\n" +
"05886116467109405077541002256983155200055935729725\n" +
"71636269561882670428252483600823257530420752963450".replaceAll("\\n", "");您只替换了该字符串的最后一次连接(注意:它没有"\n")。
您需要做的是去掉字符串声明中的replaceAll，在main方法中执行s = s.replaceAll("\n", "");，如下所示：
public static void main(String[] args) {
s = s.replaceAll("\n", "");
System.out.println(s);
}测试和工作:D希望这是有用的:D
Stack Overflow用户
发布于 2015-03-22 20:51:33
在像这样打印字符串之前，您可以拆分并加入字符串：
public static void main(String[] args) {
System.out.println(String.join("", s.split("\n")));
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/29199604
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