Groovy Discovery: Writing groovy-style code for strings

This article is used to describe some of the groovy-style code in the handling of strings, and the groovy-style code here is mostly different from the coding style of the Java language.

First, we're going to define a string object to use as our example:

def str = "hello"

Now, what we're going to say is the style of the substring.

In the Java language, to remove a substring labeled 1 and 2, you must use the "substring" method as shown here:

println str.substring(1,3)

And in the groovy language, we just have to encode the following:

println str[1..2]

The results of the run are:

el

Next, we want to get the substring starting with subscript 1, to the penultimate digit, in the Java language, we must encode the following:

println str.substring(1,str.length()-1)

However, the groovy language-style code is the following:

println str[1..-2]

The results of the operation are:

ell

The above coding style will be the basis of our handling of strings in the groovy language. The following coding style code starts here.

Now, we're going to simulate that in the Java language, when we use reflection technology, we often need to get the "set" and "got" methods of the property from an attribute name of the known JavaBean:

def propName = "email"

def firstSetFunctionName = "set"+propName.substring(0,1).toUpperCase()

def nextSetFunctionName = propName.substring(1,propName.length())

def setFunctionName = firstSetFunctionName+nextSetFunctionName

def firstGetFunctionName = "get"+propName.substring(0,1).toUpperCase()

def nextGetFunctionName = propName.substring(1,propName.length())

def getFunctionName = firstGetFunctionName+nextGetFunctionName

println setFunctionName

println getFunctionName