将每个首字符转化为大写

public class Test{
	
	public static void main(String args[]) {
	
		String str="let it go";
		char ch[]=str.toCharArray();
		int i=0;
		ch[0]=(char) (ch[0]-32);
	for(char ch1:ch) {
		
		if(ch1==' ') {
			ch[i+1]=(char) (ch[i+1]-'a'+'A');
			
		}
		i++;
	}
	str=String.copyValueOf(ch);
		System.out.print(str);
		
	}

}