System.out.println(first.concat("his father"));
System.out.println(first.replace('i','z'));
System.out.println(second.replace('i','z'));
我这样可不可啊,总是在println说需要标识符
System.out.println(first.replace('i','z'));
System.out.println(second.replace('i','z'));
我这样可不可啊,总是在println说需要标识符
second 在哪里啊?String first = "";
String second = "";
System.out.println(first.concat("his father"));
System.out.println(first.replace('i','z'));
System.out.println(second.replace('i','z'));
public static void main(String[] args) {
String first = "";
String second = "";
System.out.println(first.concat("his father"));
System.out.println(first.replace('i','z'));
System.out.println(second.replace('i','z'));
}
}
class Equal
{
Equal()
{}
public static void main(String[] a)
{
String first="This is";
String second="This is";
System.out.println(first);
System.out.println(second);
if(first==second)
{
System.out.println("first和second指向同一个对象");
}
else{System.out.println("first和second指向不是同一个对象");
}
if(first.equals(second))
{System.out.println("first和second内容相同");}
else{
System.out.println("first和second内容不相同");}
}
/** 此方法检查字符串的相等性、连接和
替换字符 */
System.out.println(first.concat("his father"));
System.out.println(first.replace('i','z'));
System.out.println(second.replace('i','z'));
class Equal
{
Equal()
{
} public static void main(String[] args)
{
String first = "This is";
String second = "This is";
System.out.println(first);
System.out.println(second);
if(first == second)
{
System.out.println("first和second指向同一个对象");
}else
{
System.out.println("first和second指向不是同一个对象");
}
if(first.equals(second))
{
System.out.println("first和second内容相同");
}else
{
System.out.println("first和second内容不相同");
} /**
* 此方法检查字符串的相等性、连接和 替换字符
*/ System.out.println(first.concat("his father"));
System.out.println(first.replace('i', 'z'));
System.out.println(second.replace('i', 'z'));
}
}