5-4.txt

jsp常用实例讲解

public class GradeLevel{
public static void main( String args[] ){
System.out.println("\n** first situation **");
char grade='C'; //normal use
switch( grade ){
case 'A' :
System.out.println(grade+" is 85～100");
break;
case 'B' 
: System.out.println(grade+" is 70～84");
break;
case 'C' :
System.out.println(grade+" is 60～69");
break;
case 'D' :
System.out.println(grade+" is ＜60"＝;
break;
default :	
System.out.println("input error");
}
System.out.println("\n** second situation **");
grade='A'; //creat error without break statement
switch( grade ){
case 'A' :	
System.out.println(grade+" is 85～100");
case 'B' :
System.out.println(grade+" is 70～84");
case 'C' :
System.out.println(grade+" is 60～69");
case 'D' :
System.out.println(grade+" is ＜60"＝;
default :
System.out.println("input error");
}
System.out.println("\n** third situation **");
grade='B'; //several case with same operation
switch( grade ){
case 'A' :
case 'B' :
case 'C' :
System.out.println(grade+" is ＞=60");
break;
case 'D' :
System.out.println(grade+" is ＜60"＝;
break;
default :
System.out.println("input error");
}
}
}