拆分由多個空格分隔的單詞的行

Question

我正在逐行解析一些文本文件，我的需要是拆分由多個空格分隔的單詞的行。請建議我如何做到這一點

示例文本

John  is  working in London 

所需的輸出

John 
is 
working 
in London 

Answer 1

使用\s{2,}匹配多個空格：

String text = "John  is  working in London"; 
String[] words = text.split("\\s{2,}"); 
for (String word : words) 
    System.out.println(word); 

Answer 2

這會爲你工作。 \1+將取代一個或多個空格。

String str="John  is  working in London"; 
     String[] arr=str.replaceAll("([\" \"])\\1+"," ").split(" "); 
     for(String i:arr){ 
      System.out.println(i.trim()); 
     } 

直播Demo

出把

John 
is 
working 
in 
London 

Answer 3

試試這個簡單的正則表達式：

String[] words = str.split(" +"); 

Answer 4

可以使用java.util.StringTokenizer的類。

StringTokenizer st = new StringTokenizer("John  is  working in London"," ",false); 
while (st.hasMoreElements()) { 
     System.out.println("StringTokenizer Output: " + st.nextElement()); 
    } 

輸出：

John 
is 
working 
in 
London