Initial commit

Uebung09Zeichenketten.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

src/de/itstall/Main.java

+package de.itstall;
+
+public class Main {
+
+    public static void main(String[] args) {
+        String strText = " Mein23 Text23423411 ";
+        System.out.println("digitCount:\t\t\t" + digitCount(strText));
+        System.out.println("stringReverse:\t\t|" + stringReverse(strText) + "|");
+        System.out.println("lTrim:\t\t\t\t|" + lTrim(strText) + "|");
+        System.out.println("rTrim:\t\t\t\t|" + rTrim(strText) + "|");
+        System.out.println("trim:\t\t\t\t|" + trim(strText) + "|");
+        System.out.println("subStringCount:\t\t" + subStringCount(strText, "2"));
+    }
+
+    /**
+     * Counts digits in strText
+     * @param strText : String
+     * @return int
+     */
+    public static int digitCount(String strText) {
+        int iReturn = 0;
+
+        for(int i = 0; i < strText.length(); i++) {
+            char c = strText.charAt(i);
+            if(c < '0' || c > '9') continue;
+            iReturn++;
+        }
+
+        return iReturn;
+    }
+
+    /**
+     * Reverses a String
+     * @param strText : String : Text to reverse
+     * @return String
+     */
+    public static String stringReverse(String strText) {
+        String strReturn = "";
+        char[] cText = strText.toCharArray();
+
+        for(int i = cText.length - 1; i >= 0; i--) {
+            strReturn += String.valueOf(cText[i]);
+        }
+
+        return strReturn;
+    }
+
+    /**
+     * Removes leading spaces
+     * @param strText : String
+     * @return String
+     */
+    public static String lTrim(String strText) {
+        String strReturn = "";
+        int iTemp = 0;
+        char[] cText = strText.toCharArray();
+        boolean checkForWhitespace = true;
+
+        for(char i : cText) {
+            if(Character.isWhitespace(i) && checkForWhitespace) {
+                iTemp++;
+            }
+            else {
+                checkForWhitespace = false;
+                strReturn += String.valueOf(i);
+            }
+        }
+
+        return strReturn;
+    }
+
+    /**
+     * Removes last spaces
+     * @param strText : String
+     * @return String
+     */
+    public static String rTrim(String strText) {
+        String strReturn = "";
+        int iFounds = 0;
+        char[] cText = strText.toCharArray();
+        boolean checkForWhitespace = true;
+
+        for(int i = cText.length; i > 0; i--) {
+            if (Character.isWhitespace(cText[(cText.length - i)]) && checkForWhitespace) {
+                iFounds++;
+            } else {
+                checkForWhitespace = false;
+            }
+        }
+        strReturn = strText.substring(0, strText.length() - iFounds);
+
+        return strReturn;
+    }
+
+    /**
+     * removes leading and last spaces
+     * @param strText : String
+     * @return String
+     */
+    public static String trim(String strText) {
+        String strReturn = "";
+
+        strReturn = rTrim(strText);
+        strReturn = lTrim(strReturn);
+
+        return strReturn;
+    }
+
+    /**
+     * Counts search in given String
+     * @param strText
+     * @return
+     */
+    public static int subStringCount(String strText, String strSearch) {
+        int iReturn = 0;
+
+        if(0 != strSearch.length()) {
+            for(int i = strText.indexOf(strSearch, 0); i != -1; i = strText.indexOf(strSearch, i +1)) {
+                iReturn++;
+            }
+        }
+
+        return iReturn;
+    }
+}