Exercise 3.1

Seth Underhill · Seth Underhill · commit 65c0a0569420 · 2022-06-13T07:33:47.000-05:00
diff --git a/ch03/WhatHappensPrintf.java b/ch03/WhatHappensPrintf.java
@@ -0,0 +1,25 @@
+
+public class WhatHappensPrintf {
+/**	
+	Exercise 3.1 When you use printf, the Java compiler does not check your
+	format string. See what happens if you try to display a value with type int
+	using %f. And what happens if you display a double using %d? What if you
+	use two format specifiers, but then provide only one value?
+**/
+	public static void main (String[] arguments) {
+		final int x = 10;
+		final double y = 3.25;
+
+		//print int with %f
+		System.out.printf("Print int with floating point format mask %f", x); 
+			// throws java.util.IllegalFormatConversionException
+		
+		//print double with %d
+		System.out.printf("Print double with integer format mask %d", y); 
+			// throws java.util.IllegalFormatConversionException
+		
+		//print with format specifiers but only one argument
+		System.out.printf("Print with two format specifiers %d and %f, but with only one argument supplied.", x); 
+			// throws java.util.MissingFormatArgumentException
+	}
+}
