Consider the following Java-like program fragment. (There are line numbers to the left of each line of code that are not part of the program.) 1 j = 1; 2 y = 1.0; 3 s = false; 4 if (j < y) 5   { j = s; } 6 else 7   { s = y; } 8 y = j; Assume that the Java-like language uses dynamic typing and is strongly-typed. Widening conversions are allowed, but narrowing conversions are not. Which lines produce type errors?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider the following Java-like program fragment. (There are line numbers to the left of each line of code that are not part of the program.)
1 j = 1;
2 y = 1.0;
3 s = false;
4 if (j < y)
5   { j = s; }
6 else
7   { s = y; }
8 y = j;

Assume that the Java-like language uses dynamic typing and is strongly-typed. Widening conversions are allowed, but narrowing conversions are not. Which lines produce type errors?

 

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