X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=core%2Fsrc%2Fnet%2Fsf%2Fopenrocket%2Futil%2FSimpleStack.java;fp=core%2Fsrc%2Fnet%2Fsf%2Fopenrocket%2Futil%2FSimpleStack.java;h=6bdd9671832be1a0c132207d4c32edae4f6b7856;hb=9349577cdfdff682b2aabd6daa24fdc3a7449b58;hp=0000000000000000000000000000000000000000;hpb=30ba0a882f0c061176ba14dbf86d3d6fad096c02;p=debian%2Fopenrocket

diff --git a/core/src/net/sf/openrocket/util/SimpleStack.java b/core/src/net/sf/openrocket/util/SimpleStack.java
new file mode 100644
index 00000000..6bdd9671
--- /dev/null
+++ b/core/src/net/sf/openrocket/util/SimpleStack.java
@@ -0,0 +1,29 @@
+package net.sf.openrocket.util;
+
+import java.util.NoSuchElementException;
+/**
+ * SimpleStack implementation backed by an ArrayList.
+ * 
+ */
+public class SimpleStack<T> extends ArrayList<T> {
+
+	public void push( T value ) {
+		this.add(value);
+	}
+	
+	public T peek() {
+		if ( size() <= 0 ) {
+			return null;
+		}
+		return this.get( size() -1 );
+	}
+	
+	public T pop() {
+		if ( size() <= 0 ) {
+			throw new NoSuchElementException();
+		}
+		T value = this.remove( size() -1 );
+		return value;
+	}
+	
+}