本人新手，学习corejava 目前进度到了控制语句，但是遇到这个问题。。。
public class Menu {
public static void main(String args[]){
throws java.io.IOException{
char choice;
do{
System.out.println("Help on:");
System.out.println("1.if");
System.out.println("2.switch");
System.out.println("3.while");
System.out.println("4.do-while");
System.out.println("5.for\n");
System.out.println("choose one:");
choice =(char) System.in.read();
}while(choice<'1'||choice>'5');
System.out.println("\n");
switch(choice){}
case '1':
System.out.println("The if:\n");
System.out.println("if(condition) statement");
System.out.println("else statement");
break;
case '2':
System.out.println("The switch");
System.out.println("switch(expression) {");
System.out.println("case constant:");
System.out.println("statement sequence");
System.out.println("break");
System.out.println("//...");
System.out.println("}");
break;
case '3':
System.out.println("The while:");
System.out.println("while (condition) statement");
break;
case '4':
System.out.println("The do-while:");
System.out.println("do (");
System.out.println("statement");
System.out.println("} while(condition)");
break;
case '5':
System.out.println("The for:");
System.out.println("for(int;condition;iteration)");
System.out.println("statement");
break;
}
}
}
不能编译，提示throws java.io.IOException 语法错误，但是例子就是这样写的，请各位高手帮忙看看。。 --------------------编程问答--------------------
public class Menu {
public static void main(String args[]) throws java.io.IOException {
char choice;
do {
System.out.println("Help on:");
System.out.println("1.if");
System.out.println("2.switch");
System.out.println("3.while");
System.out.println("4.do-while");
System.out.println("5.for\n");
System.out.println("choose one:");
choice = (char) System.in.read();
} while (choice < '1' || choice > '5');
System.out.println("\n");
switch (choice) {
case '1':
System.out.println("The if:\n");
System.out.println("if(condition) statement");
System.out.println("else statement");
break;
case '2':
System.out.println("The switch");
System.out.println("switch(expression) {");
System.out.println("case constant:");
System.out.println("statement sequence");
System.out.println("break");
System.out.println("//...");
System.out.println("}");
break;
case '3':
System.out.println("The while:");
System.out.println("while (condition) statement");
break;
case '4':
System.out.println("The do-while:");
System.out.println("do (");
System.out.println("statement");
System.out.println("} while(condition)");
break;
case '5':
System.out.println("The for:");
System.out.println("for(int;condition;iteration)");
System.out.println("statement");
break;
}
}
}
我帮你改了不报错了，你自己比对下。。。 --------------------编程问答--------------------
非常感谢。。怪自己粗心。。
--------------------编程问答--------------------
还真是挺隐蔽的...
补充：Java , Eclipse
