public class Beijing {
public static void main (String arge []) {
int age=23;//定义int类型
long c=2323232;//定义长整型
char beij=‘汉‘;
System.out.print(beij);
boolean beijing=false;//定义boolen
System.out.println(beijing);
}
}
//定义
public class Dingyi {
public static void main( String args[]) {
short a=0;
int i=11;
long l=22;
double d=555;
float m=1.9f;
System.out.println(i/m*d/l);
}
}
//运算
public class Iftest {
public static void main( String args[]) {
int i=2;
if (i> 1 && i< 11){
System.out.println("i是位于1和11");
}else {
System.out.println("i不是位于1和11之间");
}
}
}
//if语句
public class Switchjava { public static void main(String args[]) { char c=‘1‘; switch (c) { case ‘b‘: System.out.println(‘n‘); break; case ‘a‘: System.out.println(‘b‘); break; default: System.out.println(‘d‘); } } } //switch语句
原文：http://www.cnblogs.com/leiziv5/p/7890827.html