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BAEL-838 Refactord code with Java8 examples. (#1833)

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* Code for Dependency Injection Article.

* Added Java based configuration. Downloaded formatter.xml and reformatted
all changed files. Manually changed tab into 4 spaces in XML
configuration files.

* BAEL-434 - Spring Roo project files generated by Spring Roo. No
formatting applied. Added POM, java and resources folders.

* Moved project from roo to spring-roo folder.

* BAEL-838 Initial code showing how to remove last char - helper class and tests.

* BAEL-838 Corrected Helper class and associated empty string test case. Added StringUtils.substing tests.

* BAEL-838 Refromatted code using formatter.xml. Added Assert.assertEquals import. Renamed test to follow convention. Reordered tests.

* BAEL-838 - Added regex method and updated tests.

* BAEL-838 Added new line examples.

* BAEL-838 Renamed RemoveLastChar class to StringHelper and added Java8 examples. Refactord code.

* BAEL-838 Changed method names
This commit is contained in:
iaforek
2017-05-13 23:24:31 +01:00
committed by pedja4
parent d172d2d63d
commit 075eeb1539
3 changed files with 55 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
core-java/src/main/java/com/baeldung/string/RemoveLastChar.java
View File

@@ -1,19 +0,0 @@
package com.baeldung.string;
public class RemoveLastChar {
public static String substring(String s) {
if (s == null || s.length() == 0) {
return s;
} else {
return (s.substring(0, s.length() - 1));
}
}
public static String chop(String s) {
if (s == null) {
return s;
} else {
return s.replaceAll(".$", "");
}
}
}

26
core-java/src/main/java/com/baeldung/string/StringHelper.java Normal file
View File

@@ -0,0 +1,26 @@
package com.baeldung.string;
import java.util.Optional;
public class StringHelper {
public static String removeLastChar(String s) {
return (s == null || s.length() == 0) ? s : (s.substring(0, s.length() - 1));
}
public static String removeLastCharRegex(String s) {
return (s == null) ? s : s.replaceAll(".$", "");
}
public static String removeLastCharOptional(String s) {
return Optional.ofNullable(s)
.filter(str -> str.length() != 0)
.map(str -> str.substring(0, str.length() - 1))
.orElse(s);
}
public static String removeLastCharRegexOptional(String s) {
return Optional.ofNullable(s)
.map(str -> str.replaceAll(".$", ""))
.orElse(null);
}
}