java for语句demo

class ForDemo
{
<wbr>public static void main(String[] args)<br><wbr>{<br><wbr><wbr><br><wbr><wbr>最简单的无限循环<br><wbr><wbr>while (true)<br><wbr><wbr>{<br><wbr><wbr>}<br><wbr><wbr>for(;;)<wbr><wbr> //不写条件默认为真<br><wbr><wbr>{<br><wbr><wbr>}<br><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>//体现For的执行顺序<br><wbr><wbr>int x = 1;<br><wbr><wbr>for (System.out.println("a"); x &lt; 3; System.out.println("b"))<br><wbr><wbr>{<br><wbr><wbr><wbr>System.out.println("c");<br><wbr><wbr><wbr>x++ ;<br><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>//嵌套循环、<br><wbr><wbr><br><wbr><wbr>****<br><wbr><wbr>****<br><wbr><wbr>****<br><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>for (int a = 0; a &lt; 3 ; a++)<br><wbr><wbr>{<br><wbr><wbr><wbr>for (int b = 0; b &lt; 4; b++)<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>System.out.print("*");<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>System.out.println();<br><wbr><wbr>}<br><wbr><wbr><br><wbr><wbr><br><wbr><wbr>*****<br><wbr><wbr>****<br><wbr><wbr>***<br><wbr><wbr>**<br><wbr><wbr>*<br><wbr><wbr><br><wbr><wbr>for (int a = 0; a &lt; 5; a++)<br><wbr><wbr>{<br><wbr><wbr><wbr>for (int b = 5; b &gt; a; b--)<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>System.out.print("*");<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>System.out.println();<br><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><br><wbr><wbr>*<br><wbr><wbr>**<br><wbr><wbr>***<br><wbr><wbr>****<br><wbr><wbr>*****<br><wbr><wbr><br><wbr><wbr>for (int a = 0; a &lt; 5; a++)<br><wbr><wbr>{<br><wbr><wbr><wbr>for (int b = 0; b &lt;= a; b++)<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>System.out.print("*");<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>System.out.println();<br><wbr><wbr>}<br><wbr><wbr><wbr><wbr><br><wbr><wbr>1<br><wbr><wbr>12<br><wbr><wbr>123<br><wbr><wbr>1234<br><wbr><wbr>12345<br><wbr><wbr><br><wbr><wbr>for (int a = 0; a &lt; 5; a++)<br><wbr><wbr>{<br><wbr><wbr><wbr>for (int b = 0; b &lt;= a; b++)<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>System.out.print(b+1);<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>System.out.println();<br><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr>//乘法九九表<br><wbr><wbr><br><wbr><wbr>1*1=1<br><wbr><wbr>1*2=2 2*2=4<br><wbr><wbr>1*3=3 2*3=6 3*3=9<br><wbr><wbr>...<br><wbr><wbr><br><wbr><wbr>for (int a = 1; a &lt; 10; a++)<br><wbr><wbr>{<br><wbr><wbr><wbr>for (int b = 1; b &lt;= a; b++)<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>System.out.print(b + "*" + a + "=" + (a*b) + "\t");<wbr> //"\t"转移字符，制表符<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr>System.out.println();<br><wbr><wbr>}<br><wbr>}<br> }<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>