HashMap

One key to couple values

HashMap/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

HashMap/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>MakeResult</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>

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

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.6
+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.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6

HashMap/src/Main.java

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+import java.awt.List;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+
+
+
+
+public class Main {
+  public static void main (String[] args) throws IOException{
+	  BufferedWriter writer = new BufferedWriter(new FileWriter(new File("/Users/hakuri/Desktop/data2.txt")));
+      BufferedReader reader=new BufferedReader(new FileReader(new File("/Users/hakuri/Desktop/final.txt")));
+      String lineTxt = null;
+      int i=1;
+    //  ArrayList<String> brand = new ArrayList<String>();
+      HashMap<String,ArrayList> custom=new HashMap<String,ArrayList>();
+
+
+      while((lineTxt = reader.readLine()) != null){
+    	  //System.out.println(lineTxt);
+    	     String line=lineTxt.trim();
+    	     String[] part=line.split(",");
+    	     if(!custom.containsKey(part[0])){
+    	    	 custom.put(part[0],new ArrayList());
+    	      custom.get(part[0]).add(part[1]);
+    	     }
+    	     else{
+    	    	 custom.get(part[0]).add(part[1]);
+    	     }
+    	    //	 custom.put(part[0], part[1]); 
+      }
+   //System.out.print(custom);
+   Iterator<String> it=custom.keySet().iterator();
+   while( it.hasNext()){
+	   String key=(String)it.next();
+	   ArrayList value=custom.get(key);
+	   System.out.println(key+"--"+value);
+   }
+   //System.out.println(custom.keySet().iterator());
+  }
+
+  }
+