Question

Java

6. What is the output (what prints) given the following code? double xy = 1/2; System.out.println(xy);

7. How do you fix the code in #6 above?

8. What is the import statement?

9. Show an example of how to use one of the String methods.

10. What are escape characters? Give examples.

Answer 1

$\color{blue}\underline{6:}$

0.0

$\color{blue}\underline{7:}$

by changing either 1 or 2 to 1.0 or 2.0 in 1/2.0

code:

double xy = 1/2.0; 
System.out.println(xy);

This prints 0.5

$\color{blue}\underline{8:}$

$The \;import \;statement \;in \;Java \;allows \;to \;refer \;to \;classes \;which \;are \;declared$

$\;in \;other \;packages \;to \;be \;accessed \;without \;referring \;to \;the \;full \;package \;name.\;$

$\color{blue}\underline{9:}$

String str = "hello";
int length = str.length();

$length\;method\;provides\;length\;of\;the\;string$

$\color{blue}\underline{10:}$

$inside\;a\;string\;certain\;characters\;have\;some\;special\;meaning\;for\;example\;"$

$escape\;characters\;are\;used\;to\;escape\;this\;special\;meaning\;these\;special\;characters\;hava$

$example:$

String str = "hello\" How are you";

String str = "hello\\ How are you";