From dde16d49785d022ec98163638b62eaababcdffa7 Mon Sep 17 00:00:00 2001
From: Schankula Christopher <schankuc@mcmaster.ca>
Date: Sat, 24 Feb 2018 17:01:45 -0500
Subject: [PATCH] example of parameterized lambda functions
---
src/sandbox/GeneralCompare.java | 5 +++++
src/sandbox/TestLambdas.java | 17 +++++++++++------
2 files changed, 16 insertions(+), 6 deletions(-)
create mode 100644 src/sandbox/GeneralCompare.java
diff --git a/src/sandbox/GeneralCompare.java b/src/sandbox/GeneralCompare.java
new file mode 100644
index 0000000..29332aa
--- /dev/null
+++ b/src/sandbox/GeneralCompare.java
@@ -0,0 +1,5 @@
+package sandbox;
+
+public interface GeneralCompare<T> {
+ public int eval(T a1, T a2);
+}
diff --git a/src/sandbox/TestLambdas.java b/src/sandbox/TestLambdas.java
index 69ac2bc..91dc35c 100644
--- a/src/sandbox/TestLambdas.java
+++ b/src/sandbox/TestLambdas.java
@@ -7,9 +7,9 @@ package sandbox;
public class TestLambdas {
public static void main(String[] args) {
//declare the instances of BinaryIntExpression
- BinaryIntExpression b0;
- BinaryIntExpression b1;
- BinaryIntExpression b2;
+ GeneralCompare<Integer> b0;
+ GeneralCompare<Integer> b1;
+ GeneralCompare<Integer> b2;
BinaryIntExpression b3;
BinaryIntExpression b4;
BinaryIntExpression b5;
@@ -34,13 +34,13 @@ public class TestLambdas {
};
//call the main function using the instances as a parameter.
- result = binaryOperation(1,2,b0);
+ result = binaryIntegerOperation(1,2,b0);
System.out.println(result);
- result = binaryOperation(1,2,b1);
+ result = binaryIntegerOperation(1,2,b1);
System.out.println(result);
- result = binaryOperation(1,2,b2);
+ result = binaryIntegerOperation(1,2,b2);
System.out.println(result);
result = binaryOperation(1,2,b3);
@@ -61,4 +61,9 @@ public class TestLambdas {
return exp.eval(a1, a2);
}
+ public static int binaryIntegerOperation(int a1, int a2, GeneralCompare<Integer> exp) {
+ //call the eval() function in the given BinaryIntExpression.
+ return exp.eval(a1, a2);
+ }
+
}
--
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