Initial commit

ardallie · ardallie · commit b142da9b1290 · 2021-08-09T21:38:22.000+01:00
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,38 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# IDEA project files
+.idea
+*.iml
+
+# out
+/out
+
+# SQLite database
+/dbase
+
+# Local libraries
+/lib
+
+# Keys
+config.properties
diff --git a/src/easy/AbCheck.java b/src/easy/AbCheck.java
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+package easy;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Have the function ABCheck(str) take the str parameter being passed
+ * and return the string true if the characters a and b are separated by exactly 3 places
+ * anywhere in the string at least once (i.e. "lane borrowed" would result in true
+ * because there is exactly three characters between a and b). Otherwise, return the string false.
+ */
+public class AbCheck {
+
+  /**
+   * AB Check function.
+   *
+   * @param str input string
+   * @return the string true if the characters a and b are separated by exactly 3 places
+   */
+  private static String abCheck(String str) {
+    Pattern pattern = Pattern.compile("(a...b|b...a)");
+    Matcher matcher = pattern.matcher(str);
+    return matcher.find() ? "true" : "false";
+  }
+
+  /**
+   * Entry point.
+   *
+   * @param args command line arguments
+   */
+  public static void main(String[] args) {
+    var result1 = abCheck("lane borrowed");
+    System.out.println(result1);
+    var result2 = abCheck("australia");
+    System.out.println(result2);
+  }
+
+}
