import javax.swing.*; public class Home1{ public static void main (String arge[]){ String x=JOptionPane.showInputDialog("请输入x的值"); char c1=value.charAt(0); char c2=c1-32; System.out.println("c2"); } } //这样写对么?
import javax.swing.*; public class Home1{ public static void main (String arge[]){ String x=JOptionPane.showInputDialog("请输入x的值"); char c1=x.charAt(0); char c2=c1-32; System.out.println(c2); } }
class ToUpCase { public static String B; public static String S="abc"; void toUpperCase(String s2){
}
public static void main(String args[]){ ToUpCase tu = new ToUpCase(); tu.toUpperCase(S); System.out.println(S); System.out.println(S.toUpperCase()); } }
class ToUpCase {
public static String S="abc"; void toUpperCase(String s){
}
public static void main(String args[]){ ToUpCase tu = new ToUpCase(); tu.toUpperCase(S); System.out.println(S); System.out.println(S.toUpperCase()); } } 上面写错了啊, 不好意思
例:"abc".toUpperCase();这样返回的就是一个大写的字符串了。。
public class Home1{
public static void main (String arge[]){
String x=JOptionPane.showInputDialog("请输入x的值");
char c1=value.charAt(0);
char c2=c1-32;
System.out.println("c2");
}
}
//这样写对么?
public class Home1{
public static void main (String arge[]){
String x=JOptionPane.showInputDialog("请输入x的值");
char c1=x.charAt(0);
char c2=c1-32;
System.out.println(c2);
}
}
public static String B;
public static String S="abc";
void toUpperCase(String s2){
}
public static void main(String args[]){
ToUpCase tu = new ToUpCase();
tu.toUpperCase(S);
System.out.println(S);
System.out.println(S.toUpperCase());
}
}
public static String S="abc";
void toUpperCase(String s){
}
public static void main(String args[]){
ToUpCase tu = new ToUpCase();
tu.toUpperCase(S);
System.out.println(S);
System.out.println(S.toUpperCase());
}
}
上面写错了啊, 不好意思
String s=JOptionPane.showInputDialog("请输入:");
String a="";
for(int i=0;i<s.length();i++){
char c=s.charAt(i);
if(c>='a'&&c<='z'){
c-=32;
}
a+=c;
}
System.out.print(a); }}
public class Home1{
void toUpperCase(String x){
}
public static void main (String arge[]){
String x=JOptionPane.showInputDialog("请输入x的值");
char c1=x.charAt(0);
int c2=c1-32;
System.out.println(x.toUpperCase());
System.out.println(String.valueOf(c2));
}
}
public class Home2{
public static void main (String arge[]){
String str=JOptionPane.showInputDialog("请输入一个字母");//输入
/*char c1=str.charAt(0);//转换类型
char c2= (char)(c1-32);//小转大
char c3= (char)(c1+32);//大转小
if(c1>96 ){ System.out.println(c2);
}
if(c1<=90) { System.out.println(c3);
}}
}
自己写的还请高手指教