package a;
public class ab {
public static void main(String[] args) {
// TODO Auto-generated method stub
int a = 1;
int b = 2;
int c = a;
a = b;
b = c;
System.out.println(a);
System.out.println(b);
}
}
2.public static void main(String[] args) {
int i=1000;
int a=i/1000;
int b=i/100%10;
int c=i/10%10;
int d=i%10;
System.out.println(a+b+c+d);
}
}
3.package a;
public class ab {
public static void main(String[] args) {
// TODO Auto-generated method stub
float s=22.0f;
float f=222.0f;
float sTof=(f-32)*5/9;
float fToc=s*9/5+32;
System.out.println("摄氏转华氏="+sTof);
System.out.println("华氏转摄氏="+fToc);
}
}
4.package a;
public class ab {
public static void main(String[] args) {
// TODO Auto-generated method stub
char c='A';
System.out.println((char)(c+32));
}
}