package filter;
import java.util.Scanner;
public class Main {
public static void main(String[] args) throws ClassNotFoundException {
Class clazz1 = Class.forName("filter.Filter");
Class clazz2 = Class.forName("filter.LowercaseFilter");
System.out.println(clazz1.isInterface()+" "+clazz1.isAssignableFrom(clazz2));
Scanner scanner = new Scanner(System.in);
String input = scanner.nextLine();
LowercaseFilter filter = new LowercaseFilter(input);
System.out.println("原文是："+filter.getValue());
filter.doFilter();
System.out.println("过滤处理后："+filter.getValue());
}
}
package filter;
public interface Filter {
public void doFilter();
}
package filter;
class LowercaseFilter implements Filter{
private String value;
public void setValue(String value){
this.value = value;
}
public String getValue(){
return value;
}
public LowercaseFilter(String input){
setValue(input);
}
public void doFilter(){
char[] c =value.toCharArray();
for(int i = 0;i
if('a'<=c[i]&&c[i]>='z'){
c[i]=(char)(c[i]-32);
}
}
String str = new String(c);
setValue(str);
}
}
见上代码，为什么输出结果与输入结果相同，没有转化，在不改变主函数和接口的情况下如何修改，谢谢
条件写错了
if('a'<=c[i]&&c[i]>='z')
改为：
if('a'<=c[i]&&c[i]<='z')