Convert string representing key-value pairs to Map

Question

How can I convert a String into a Map:

Map m = convert("A=4 H=X PO=87"); // What's convert? System.err.println(m.getClass().getSimpleName()+m); 

Expected output:

HashMap{A=4, H=X, PO=87} 

Answer 1

There is no need to reinvent the wheel. The Google Guava library provides the Splitter class.

Here's how you can use it along with some test code:

package com.sandbox;  import com.google.common.base.Splitter; import org.junit.Test;  import java.util.Map;  import static org.junit.Assert.assertEquals;  public class SandboxTest {      @Test     public void testQuestionInput() {         Map<String, String> map = splitToMap("A=4 H=X PO=87");         assertEquals("4", map.get("A"));         assertEquals("X", map.get("H"));         assertEquals("87", map.get("PO"));     }      private Map<String, String> splitToMap(String in) {         return Splitter.on(" ").withKeyValueSeparator("=").split(in);     }  }