Made emphasis values static parameters.

src/solvers/MIPModel.java

@@ -18,6 +18,7 @@ import xmtrclusters.Problem;
  */
 public final class MIPModel {
   private static final double HALF = 0.5;  // for rounding binary values
+  private static final int BESTBOUND = 3;  // emphasizes improving best bound
 
   private final Problem problem;  // the parent problem
 
@@ -184,7 +185,7 @@ public final class MIPModel {
    */
   public double solve(final double sec) throws IloException {
     mip.setParam(IloCplex.DoubleParam.TimeLimit, sec);
-    mip.setParam(IloCplex.Param.Emphasis.MIP, 3);
+    mip.setParam(IloCplex.Param.Emphasis.MIP, BESTBOUND);
     mip.solve();
     return mip.getObjValue();
   }

src/solvers/MIPModel2.java

@@ -24,7 +24,8 @@ import xmtrclusters.Problem;
  * @author Paul A. Rubin (rubin@msu.edu)
  */
 public final class MIPModel2 {
-  private static final double HALF = 0.5;  // for rounding binary values
+  private static final double HALF = 0.5;   // for rounding binary values
+  private static final int OPTIMALITY = 2;  // emphasizes optimality
 
   private final Problem problem;  // the parent problem
 
@@ -171,7 +172,7 @@ public final class MIPModel2 {
    */
   public double solve(final double sec) throws IloException {
     mip.setParam(IloCplex.DoubleParam.TimeLimit, sec);
-    mip.setParam(IloCplex.Param.Emphasis.MIP, 2);
+    mip.setParam(IloCplex.Param.Emphasis.MIP, OPTIMALITY);
     mip.solve();
     return mip.getObjValue();
   }