package com; class Account { String name; double balance; public Account(String name) { this.name=name; this.balance=0; } public synchronized void put(double value) { if(value>0) this.balance+=value; System.out.println("您的存款金额为"+value+"存款成功,余额为"+this.balance); } public synchronized double get( double value) { if(value<=0) return 0; if(value<=this.balance) this.balance-=value; else { value=this.balance; this.balance=0; } System.out.println("您的取款金额为"+value+"取款成功,余额为"+this.balance); return value; } } class SaveThread extends Thread{ private Account account; private double value; public SaveThread(Account account,double value) { this.account=account; this.value=value; } public void run() { try {Thread.sleep(1);} catch(InterruptedException ex) {} this.account.put(this.value); } } class FetchThread extends Thread{ private Account account; private double value; public FetchThread(Account account,double value){ this.account = account; this.value = value; } public void run(){ try{ Thread.sleep(1); } catch(InterruptedException ex){} this.account.get(this.value); } public static void main(String[] args) { Account wang =new Account("Wang"); (new SaveThread(wang,100)).start(); (new SaveThread(wang,200)).start(); (new SaveThread(wang,300)).start(); (new FetchThread(wang,100)).start(); (new FetchThread(wang,200)).start(); } }代码查错

在这段代码中，存在一些语法错误和逻辑问题，下面是修正后的代码：

package com;

class Account {
    String name;
    double balance;

    public Account(String name) {
        this.name = name;
        this.balance = 0;
    }

    public synchronized void put(double value) {
        if (value > 0) {
            this.balance += value;
            System.out.println("您的存款金额为" + value + "存款成功,余额为" + this.balance);
        }
    }

    public synchronized double get(double value) {
        if (value <= 0)
            return 0;
        if (value <= this.balance) {
            this.balance -= value;
            System.out.println("您的取款金额为" + value + "取款成功,余额为" + this.balance);
            return value;
        } else {
            System.out.println("您的取款金额为" + value + "取款失败,余额为" + this.balance);
            return 0;
        }
    }
}

class SaveThread extends Thread {
    private Account account;
    private double value;

    public SaveThread(Account account, double value) {
        this.account = account;
        this.value = value;
    }

    public void run() {
        try {
            Thread.sleep(1);
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
        this.account.put(this.value);
    }
}

class FetchThread extends Thread {
    private Account account;
    private double value;

    public FetchThread(Account account, double value) {
        this.account = account;
        this.value = value;
    }

    public void run() {
        try {
            Thread.sleep(1);
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
        this.account.get(this.value);
    }
}

public class Main {
    public static void main(String[] args) {
        Account wang = new Account("Wang");
        (new SaveThread(wang, 100)).start();
        (new SaveThread(wang, 200)).start();
        (new SaveThread(wang, 300)).start();
        (new FetchThread(wang, 100)).start();
        (new FetchThread(wang, 200)).start();
    }
}

修正后的代码中，主要修改了以下几个问题：

1. 在Account类的put方法和get方法中，需要用大括号括起来表示if语句的范围。

2. 在FetchThread类的get方法中，需要在取款失败的情况下打印错误信息。

3. 在SaveThread和FetchThread的run方法中，需要捕获InterruptedException异常并打印它的堆栈信息。

4. 在主函数中，需要将Main类声明为public，才能被其他类所访问。

经过以上修正，代码应该可以正确运行了。