java猜数字问题在线等，请让我通过审核吧，急呀

package test;

import java.lang.Runnable;
import java.lang.Thread;
public class Runnable4 {

public static void main(String args[]) {
Number number = new Number();
number.giveNumberThread.start();
number.guessNumberThread.start();
}

}

class Number implements Runnable {

int realNumber, guessNumber, min = 0, max = 100, message;
final int SMALLER = -1, LARGER = 1, SUCCESS = 8;
Thread giveNumberThread, guessNumberThread;

Number() {
giveNumberThread = new Thread(this);
guessNumberThread = new Thread(this);

}

@Override
public void run() {
// TODO Auto-generated method stub
for (int count = 1; true; count++) {
if (Thread.currentThread() == giveNumberThread) {
if (count == 1) {
realNumber = (int) (Math.random() * 100) + 1;
System.out.println("随机给你一个数为"+realNumber+",猜猜是多少");
} else {
if (realNumber > guessNumber) {
message = SMALLER;
System.out.println("你猜小了");
} else if (realNumber < guessNumber) {
message = LARGER;
System.out.println("你猜大了");
} else {
message = SUCCESS;
System.out.println("恭喜,你猜对了");
return;
}
}
try {
Thread.sleep(1500);
} catch (Exception e) {
}
}
if (Thread.currentThread() == guessNumberThread) {
if (count == 1) {
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数:" + guessNumber);
} else {
if (message == SMALLER) {
min = guessNumber;
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数是"
+ guessNumber);
} else if (message == LARGER) {
max = guessNumber;
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数是"
+ guessNumber);
} else if (message == SUCCESS) {
System.out.println("我成功了");
return;
}
}
try {
Thread.sleep(1500);
} catch (Exception e) {
}
}
}

}
}
运行结果这样子，然后进行死循环输出87，没办法在猜对了，而且要怎么改才能把“随机给你一个数为83,猜猜是多少”置于第一行呢？每次运行都是在于第二行
我第1次猜这个数:50
随机给你一个数为83,猜猜是多少
你猜小了
你猜小了
我第3次猜这个数是75
你猜小了
我第4次猜这个数是87
你猜大了
我第5次猜这个数是93
你猜大了
我第6次猜这个数是90
你猜大了
我第7次猜这个数是88
你猜大了
我第8次猜这个数是87
你猜大了
我第9次猜这个数是87
你猜大了
我第10次猜这个数是87
你猜大了
我第11次猜这个数是87
你猜大了
我第12次猜这个数是87
你猜大了
我第13次猜这个数是87

同问为什么要两个线程。。是做练习么 = =，那么修改如下：

import java.lang.Runnable;
import java.lang.Thread;
public class Main {

public static void main(String args[]) {
Number number = new Number();
number.giveNumberThread.start();
number.guessNumberThread.start();
}

}

class Number implements Runnable {

int realNumber, guessNumber, min = 0, max = 100, message;
final int SMALLER = -1, LARGER = 1, SUCCESS = 8;
Thread giveNumberThread, guessNumberThread;

static int s = 0;
static boolean flag = true;

Number() {
giveNumberThread = new Thread(this);
guessNumberThread = new Thread(this);

}

@Override
public void run() {
int count = 1;
while(flag) {
if (Thread.currentThread() == giveNumberThread && s == 0) {
if (count == 1) {
realNumber = (int) (Math.random() * 100) + 1;
System.out.println("随机给你一个数为"+realNumber+",猜猜是多少");
} else {
if (realNumber > guessNumber) {
message = SMALLER;
System.out.println("你猜小了");
} else if (realNumber < guessNumber) {
message = LARGER;
System.out.println("你猜大了");
} else {
message = SUCCESS;
System.out.println("恭喜,你猜对了");
flag = false;
}
}
try {
Thread.sleep(1000);
} catch (Exception e) {
}
++count;
s = 1;
}
if (Thread.currentThread() == guessNumberThread && s == 1) {
if (count == 1) {
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数:" + guessNumber);
} else {
if (message == SMALLER) {
min = guessNumber;
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数是"
+ guessNumber);
} else if (message == LARGER) {
max = guessNumber;
guessNumber = (min + max) / 2;
System.out.println("我第" + count + "次猜这个数是"
+ guessNumber);
} else if (message == SUCCESS) {
System.out.println("我成功了");
return;
}
}
try {
Thread.sleep(1000);
} catch (Exception e) {
}
++count;
s = 0;
}
}

}
}
加了一个信号量s用于让两个线程交叉执行内容，flag用于标记猜对了就退出。

。。。。。。。。。为什么要用两个线程？