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2010-06-01T05:18:58Z

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в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Expression indentation for if statement ==

If the expression is too long, you can use two units of indentation for subsequent lines.



<source lang="java">
public class MainClass {
public static void main(String[] args) {
int numberOfLoginAttempts = 10;
int numberOfMinimumLoginAttempts = 12;
int numberOfMaximumLoginAttempts = 13;
int y = 3;
if (numberOfLoginAttempts < numberOfMaximumLoginAttempts
|| numberOfMinimumLoginAttempts > y) {
y++;
}
}
}</source>



== Multiple selections ==

If there are multiple selections, you can also use if with a series of else statements.



<source lang="java">
if (booleanExpression1) {
// statements
} else if (booleanExpression2) {
// statements
}
...
else {
// statements
}</source>



== Nested if Statements ==



<source lang="java">
public class MainClass {
public static void main(String[] arg) {
int a = 2;
if (a == 0) {
System.out.println("in the block");
if (a == 2) {
System.out.println("a is 0");
} else {
System.out.println("a is not 2");
}
} else {
System.out.println("a is not 0");
}
}
}</source>



<pre class=codeResult>a is not 0</pre>

== The else Clause ==



<source lang="java">
public class MainClass {
public static void main(String[] arg) {
int a = 0;
if (a == 0) {
System.out.println("in the block");
System.out.println("in the block");
} else {
System.out.println("a is not 0");
}
}
}</source>



<pre class=codeResult>in the block
in the block</pre>

== The if Statement in action ==



<source lang="java">
public class MainClass {
public static void main(String[] arg) {
int a = 0;
if (a == 0) {
System.out.println("a is 0");
}
}
}</source>



<pre class=codeResult>a is 0</pre>

== The if statement syntax ==

The if statement is a conditional branch statement.
The syntax of the if statement is either one of these two:



<source lang="java">
if (booleanExpression) {
statement (s)
}</source>



== Using braces makes your "if" statement clearer ==

If there is only one statement in an if or else block, the braces are optional.



<source lang="java">
public class MainClass {
public static void main(String[] args) {
int a = 3;
if (a > 3)
a++;
else
a = 3;
}
}</source>



== Using && in if statement ==



<source lang="java">
public class MainClass {
public static void main(String[] arg) {
int value = 8;
int count = 10;
int limit = 11;
if (++value % 2 == 0 && ++count < limit) {
System.out.println("here");
System.out.println(value);
System.out.println(count);
}
System.out.println("there");
System.out.println(value);
System.out.println(count);
}
}</source>



<pre class=codeResult>there
9
10</pre>

== Using || (or operator) in if statement ==



<source lang="java">
public class MainClass {
public static void main(String[] arg) {
int value = 8;
int count = 10;
int limit = 11;
if (++value % 2 != 0 || ++count < limit) {
System.out.println("here");
System.out.println(value);
System.out.println(count);
}
System.out.println("there");
System.out.println(value);
System.out.println(count);
}
}</source>



<pre class=codeResult>here
9
10
there
9
10</pre>

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Admin: 1 версия

в 17:44, 31 мая 2010