Added 'README.md' file and some solutions

Author: OmAximani0

.classpath

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-16">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.gitignore

@@ -21,3 +21,4 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+/bin/

.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Java DSA Assignments</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,14 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=16
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=16
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=16

README.md

@@ -0,0 +1 @@
+# Java-DSA-Assignments

src/strings/CountMatches.java

@@ -0,0 +1,16 @@
+package strings;
+
+import java.util.List;
+
+public class CountMatches {
+	public static int countMatches(List<List<String>> items, String ruleKey, String ruleValue) {
+        int count = 0;
+        int index = 0;
+        if(ruleKey.equals("color")) index = 1;
+        else if(ruleKey.equals("name")) index = 2;
+        for (List<String> arr : items) {
+            if(arr.get(index).equals(ruleValue)) count++;
+        }
+        return count;
+    }
+}

src/strings/DefangIPAddress.java

@@ -0,0 +1,8 @@
+package strings;
+
+public class DefangIPAddress {
+    public static void main(String[] args) {
+        String ip = "1.1.1.1";
+        System.out.println(ip);
+    }
+}

src/strings/GoalParserInterception.java

@@ -0,0 +1,14 @@
+package strings;
+
+public class GoalParserInterception {
+    public static void main(String[] args) {
+        String command = "(al)G(al)()()G";
+        System.out.println(interpret(command));
+    }
+
+    public static String interpret(String command) {
+        command = command.replaceAll("\\(\\)", "o");
+        command = command.replaceAll("\\(al\\)", "al");
+        return command;
+    }
+}

src/strings/RestoreString.java

@@ -0,0 +1,17 @@
+package strings;
+
+public class RestoreString {
+    public static void main(String[] args) {
+        String s = "codeleet";
+        int[] indices = {4,5,6,7,0,2,1,3};
+        System.out.println(restoreString(s, indices));
+    }
+
+    public static String restoreString(String s, int[] indices) {
+        StringBuilder builder = new StringBuilder(s);
+        for (int i = 0; i < indices.length; i++) {
+            builder.setCharAt(indices[i], s.charAt(i));
+        }
+        return builder.toString();
+    }
+}