Question

java中随机给一个String变量赋值怎么做...

public class H
{
public static void main(String args[])
{

String i ="";
String home = "主场人";
String school ="学校";

while(true)
{
homecall(i,home,school);
System.out.print(i);
}
}

public static String homecall(String b,String c,String d)
{
int a = (int)(Math.random()*4+1);
if (a==1) b=c;
if (a==2) b=c;
if (a==3) b=c;
if (a==4) b=d;
return b;
}

}

可是没有作用,打印出来的还是""

Answer 1

while(true) // 死循环
{
homecall(i,home,school);
System.out.print(i);
}
改为:
String s = homecall(i,home,school);
System.out.println(s);

Answer 2

有处错误 i 只是作为形参传进去 并不会改变值 所以也是输出空格
while(true)
{
String string;
string= homecall(i,home,school);
System.out.print(string);
}

Answer 3

将 homecall(i,home,school);
改为 i=homecall(i,home,school); 随便说声 你的while是死循环啊