把空间

Question

我只希望以后把空间和数学运算符之前：

例如：

55/2 * 456-5 + 5

结果： 55/2 * 456 - 5做到这一点+ 5

Answer 1

单程：

String lEquation = "55/2*456-5+5"; 
lEquation = lEquation.replaceAll("\\/"," \\/ ").replaceAll("\\*"," \\* ").replaceAll("-"," - ").replaceAll("\\+"," \\+ "); 
System.out.println("My equation: "+ lEquation); 

结果将会是：

My equation: 55/2 * 456 - 5 + 5