Java输入一批以问号“?”结束的字符,对“?”以前的每一个字符,如果它是大写字母,

Java输入一批以问号“?”结束的字符,对“?”以前的每一个字符,如果它是大写字母,

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;

public class Convert {


public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String strInput = "";
strInput = br.readLine();
int p = strInput.indexOf("?");
String temp = strInput.substring(0, p);
char[] char_array = temp.toCharArray();

for(int i=0;i if(char_array[i]<='z'&&char_array[i]>='a'){
char_array[i] = (char) (char_array[i]-32);
}
else if(char_array[i]<='Z'&&char_array[i]>='A'){
char_array[i] = (char) (char_array[i]+32);
}
}
temp = String.copyValueOf(char_array);
System.out.print(temp);
}

}

我知道，但是现在懒得告诉你了
再骂我几句吧

import java.util.*;
public class Test {
public static void main(String[] args) {
System.out.println("输入字符串：");
Scanner read = new Scanner(System.in);
String str = read.nextLine();
char[] c = str.toCharArray();
change(c);

for(int i=0; i if(c[i]=='?') {
break;
}
System.out.print(c[i] + " ");
}
}
public static void change(char[] c) {
for(int i=0; i if(c[i]>'a' && c[i]<'z') {
c[i] =(char) (c[i] - 32);
} else if(c[i]>'A' && c[i]<'Z') {
c[i] =(char) (c[i] + 32);
}
}
}
}

haofuza
look!
import java.io.*;
public class Test30007 {
public static void main(String[] args)throws IOException{
char ch;
ch=(char)System.in.read();
while(ch!='?'){

if(ch>'a'&&ch<'z')
ch=(char) ( ch+'A'-'a');
else if(ch>'A'&&ch<'Z')
ch=(char) (ch+'a'-'A');
System.out.print(ch);
ch=(char)System.in.read();
}
}
}