Java/JSP/Statements — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
|
(нет различий)
| |
Текущая версия на 07:10, 1 июня 2010
Содержание
- 1 For loop: Using Two Loop Indexes
- 2 Nested if Statements
- 3 Testing for Multiple Conditions
- 4 Using an if-else Ladder
- 5 Using Compound Statements
- 6 Using the break Statement
- 7 Using the continue Statement
- 8 Using the if Statement
- 9 Using the switch Statement
- 10 Using the while Loop
- 11 While: Finding a Factorial
- 12 While statement
For loop: Using Two Loop Indexes
<HTML>
<HEAD>
<TITLE>Using Two Loop Indexes</TITLE>
</HEAD>
<BODY>
<H1>Using Two Loop Indexes</H1>
<%
for (int i = 0, doubleIndex = 0; i <= 10;
i++, doubleIndex = 2 * i) {
out.println("i: " + i +
" doubleIndex: " + doubleIndex + "<BR>");
}
%>
</BODY>
</HTML>
Nested if Statements
<HTML>
<HEAD>
<TITLE>Nested if Statements</TITLE>
</HEAD>
<BODY>
<H1>Nested if Statements</H1>
<%
double value = 2;
if (value != 0) {
if (value > 0)
out.println("The result = " + (1 / value));
else
out.println("Sorry, we need a positive number.");
}
%>
</BODY>
</HTML>
Testing for Multiple Conditions
<HTML>
<HEAD>
<TITLE>Testing for Multiple Conditions</TITLE>
</HEAD>
<BODY>
<H1>Testing for Multiple Conditions</H1>
<%
int temperature = 64;
switch(temperature) {
case 60:
case 61:
case 62:
out.println("Sorry, too cold!");
break;
case 63:
case 64:
case 65:
out.println("Pretty cool.");
break;
case 66:
case 67:
out.println("Nice!");
break;
case 70:
case 74:
case 75:
out.println("Fairly warm.");
break;
default:
out.println("Too hot!");
}
%>
</BODY>
</HTML>
Using an if-else Ladder
<HTML>
<HEAD>
<TITLE>Using an if-else Ladder</TITLE>
</HEAD>
<BODY>
<H1>Using an if-else Ladder</H1>
<%
String day = "Friday";
if(day == "Monday")
out.println("It\"s Monday.");
else if (day == "Tuesday")
out.println("It\"s Tuesday.");
else if (day == "Wednesday")
out.println("It\"s Wednesday.");
else if (day == "Thurssday")
out.println("It\"s Thursday.");
else if (day == "Friday")
out.println("It\"s Friday.");
else if (day == "Saturday")
out.println("It\"s Saturday.");
else if (day == "Sunday")
out.println("It\"s Sunday.");
%>
</BODY>
</HTML>
Using Compound Statements
<HTML>
<HEAD>
<TITLE>Using Compound Statements</TITLE>
</HEAD>
<BODY>
<H1>Using Compound Statements</H1>
<%
int value = 10;
if(value > 0) {
out.println("The number was positive.");
out.println("Absolute value of " + value + " = " + value);
}
%>
</BODY>
</HTML>
Using the break Statement
<HTML>
<HEAD>
<TITLE>Using the break Statement</TITLE>
</HEAD>
<BODY>
<H1>Using the break Statement</H1>
<%
double array[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int sum = 0;
for(int i = 0; i <
array.length; i++) {
sum += array[i];
if (sum > 12) break;
out.println("Looping...<BR>");
}
out.println("The sum exceeded the maximum allowed value.");
%>
</BODY>
</HTML>
Using the continue Statement
<HTML>
<HEAD>
<TITLE>Using the continue Statement</TITLE>
</HEAD>
<BODY>
<H1>Using the continue Statement</H1>
<%
for(double i = 6; i >= -6; i--) {
if (i == 0) continue;
out.println("The reciprocal of " + i +
" is " + (1 / i) + ".<BR>");
}
%>
</BODY>
</HTML>
Using the if Statement
<HTML>
<HEAD>
<TITLE>Using the if Statement</TITLE>
</HEAD>
<BODY>
<H1>Using the if Statement</H1>
<%
int i;
for (i = 1; i <= 10; i++) {
out.println("This is iteration number "
+ i + "<BR>");
}
%>
</BODY>
</HTML>
Using the switch Statement
<HTML>
<HEAD>
<TITLE>Using the switch Statement</TITLE>
</HEAD>
<BODY>
<H1>Using the switch Statement</H1>
<%
int day = 3;
switch(day) {
case 0:
out.println("It\"s Sunday.");
break;
case 1:
out.println("It\"s Monday.");
break;
case 2:
out.println("It\"s Tuesday.");
break;
case 3:
out.println("It\"s Wednesday.");
break;
case 4:
out.println("It\"s Thursday.");
break;
case 5:
out.println("It\"s Friday.");
break;
default:
out.println("It must be Saturday.");
}
%>
</BODY>
</HTML>
Using the while Loop
<HTML>
<HEAD>
<TITLE>Using the while Loop</TITLE>
</HEAD>
<BODY>
<H1>Using the while Loop</H1>
<%
int value = 5;
while (value > 0) {
out.println("The value is now " + value-- + ".<BR>");
}
%>
</BODY>
</HTML>
While: Finding a Factorial
<HTML>
<HEAD>
<TITLE>Finding a Factorial</TITLE>
</HEAD>
<BODY>
<H1>Finding a Factorial</H1>
<%
int value = 6, factorial = 1, temporaryValue = value;
while (temporaryValue > 0) {
factorial *= temporaryValue;
temporaryValue--;
}
out.println("The factorial of " + value + " is " + factorial + ".");
%>
</BODY>
</HTML>
While statement
<HTML>
<HEAD>
<TITLE>Finding Reciprocals</TITLE>
</HEAD>
<BODY>
<H1>Finding Reciprocals</H1>
<%
double values[] = {4, 3, 2, 1, 0, 1, 2, 3, 4};
int i = 0;
while (values[i] != 0){
out.println("The reciprocal = " + 1 / values[i++] + ".<BR>");
}
%>
</BODY>
</HTML>
