Groovy - How to compare the string?

user_1602802 0
Viewed 305312

how to compare the string which is passed as a parameter

the following method is not working. 

 String str = "saveMe"

 compareString(str)

 def compareString(String str){
    def str2 = "saveMe"
    if(str2==${str}){
      println "same"
    }else{
      println "not same"
    }
 }

also tried 

 String str = "India"

 compareString(str)

 def compareString(String str){
   def str2 = "india"
   if( str2 == str ) {
     println "same"
   }else{
     println "not same"
   }
 }
groovy
7 Answers
String str = "saveMe"
compareString(str)

def compareString(String str){
  def str2 = "saveMe"

  // using single quotes
  println 'single quote string class' + 'String.class'.class
  println str + ' == ' + str2 + " ? " + (str == str2)
  println ' str = ' +  '$str' //  interpolation not supported

  // using double quotes, Interpolation supported
  println "double quoted string with interpolation " + "GString.class $str".class
  println "double quoted string without interpolation " + "String.class".class
  println "$str equals $str2 ? " + str.equals(str2) 
  println '$str == $str2 ? ' + "$str==$str2"
  println '${str == str2} ? ' + "${str==str2} ? "

  println '$str equalsIgnoreCase $str2 ? ' + str.equalsIgnoreCase(str2)   

  println '''
  triple single quoted Multi-line string, Interpolation not supported $str ${str2}
  Groovy has also an operator === that can be used for objects equality
  === is equivalent to o1.is(o2)
  '''
  println '''
  triple quoted string 
  '''
  println 'triple single quoted string ' + '''' string '''.class

  println """ 
  triple double quoted Multi-line string, Interpolation is supported $str == ${str2}
  just like double quoted strings with the addition that they are multiline
  '\${str == str2} ? ' ${str == str2} 
  """
  println 'triple double quoted string ' + """ string """.class
}

output:

single quote string classclass java.lang.String
saveMe == saveMe ? true
str = $str
double quoted string with interpolation class org.codehaus.groovy.runtime.GStringImpl
double quoted string without interpolation class java.lang.String
saveMe equals saveMe ? true
$str == $str2 ? saveMe==saveMe
${str == str2} ? true ? 
$str equalsIgnoreCase $str2 ? true 

triple single quoted Multi-line string, Interpolation not supported $str ${str2}
Groovy has also an operator === that can be used for objects equality
=== is equivalent to o1.is(o2)


triple quoted string 

triple single quoted string class java.lang.String

triple double quoted Multi-line string, Interpolation is supported saveMe == saveMe
just like double quoted strings with the addition that they are multiline
'${str == str2} ? ' true 

triple double quoted string class java.lang.String
user_15296160
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