declare variables final when possible

1 files changed, 5 insertions, 5 deletions

diff --git a/src/com.example.portfolio3/com/example/portfolio3/MatrixGraph.java b/src/com.example.portfolio3/com/example/portfolio3/MatrixGraph.java
index aac4726..985fcbb 100644
--- a/src/com.example.portfolio3/com/example/portfolio3/MatrixGraph.java
+++ b/src/com.example.portfolio3/com/example/portfolio3/MatrixGraph.java
@@ -25,7 +25,7 @@ public class MatrixGraph extends AbstractGraph {
 
   /// foo
   /// @param numVertex  maximum number of vertices allowed
-  public MatrixGraph(int numVertex){
+  public MatrixGraph(final int numVertex){
     this.numVertex=numVertex;
     matrix =new Integer[numVertex][numVertex];
     index2vertex=new Vertex[numVertex];
@@ -34,7 +34,7 @@ public class MatrixGraph extends AbstractGraph {
   /// foo
   /// @param v  vertex
   /// @return int
-  private int getIndex(Vertex v){
+  private int getIndex(final Vertex v){
     if(vertex2index.containsKey(v)) return vertex2index.get(v);
     int index=vertex2index.size();
     if(index>=index2vertex.length)throw new RuntimeException("Too many vertices in graph");
@@ -44,7 +44,7 @@ public class MatrixGraph extends AbstractGraph {
   }
 
   /// foo
-  public void insertEdge(Vertex v1,Vertex v2,int w){
+  public void insertEdge(final Vertex v1, final Vertex v2, final int w){
     matrix[getIndex(v1)][getIndex(v2)] = w;
   }
 
@@ -62,7 +62,7 @@ public class MatrixGraph extends AbstractGraph {
   }
 
   /// foo
-  public Collection<Edge> outEdge(Vertex v1){
+  public Collection<Edge> outEdge(final Vertex v1){
     HashSet<Edge> edges=new HashSet<>();
     int i=vertex2index.get(v1);
     for(int j=0;j<numVertex;j++){
@@ -74,7 +74,7 @@ public class MatrixGraph extends AbstractGraph {
   }
 
   /// foo
-  public Integer getWeight(Vertex v1,Vertex v2){
+  public Integer getWeight(final Vertex v1, final Vertex v2){
     // constant time operation
     return matrix[vertex2index.get(v1)][vertex2index.get(v2)];}
 }