public class Waiter { int var; Waiter(int var) { this("Welcome"); } Waiter(String s) { this(); System.out.println(s); } Waiter() { System.out.println("Good-bye"); } public static voidmain(String[]args) { Waiter t = newWaiter(1); } }
时间: 2024-03-23 07:38:52 浏览: 22
该代码存在语法错误,`public static voidmain(String[]args)` 应该是 `public static void main(String[] args)`,需要在 `main` 方法中修改 `Waiter t = newWaiter(1);` 为 `Waiter t = new Waiter(1);`,同时需要在程序的开头加上 `package` 语句和导入 `java.util.*` 包的语句。
修改后的代码如下:
```java
package com.example;
import java.util.*;
public class Waiter {
int var;
Waiter(int var) {
this("Welcome");
}
Waiter(String s) {
this();
System.out.println(s);
}
Waiter() {
System.out.println("Good-bye");
}
public static void main(String[] args) {
Waiter t = new Waiter(1);
}
}
```
运行该程序,输出为:
```
Good-bye
Welcome
```
相关问题
执行int var; Waiter(int var) { this("Welcome"); } Waiter(String s) { this(); System.out.println(s); } Waiter() { System.out.println("Good-bye"); } public static voidmain(String[]args) { Waiter t = newWaiter(1); } }
执行该代码会在编译时报错:`构造函数 Waiter(int) 找不到符号`。因为在创建 Waiter 对象时,传入了一个 int 类型的参数 1,但是 Waiter 类中没有定义接收一个 int 类型参数的构造函数,只有一个接收 String 类型参数的构造函数和一个无参数构造函数。因此编译器无法匹配到合适的构造函数。
data class BoxAppBean( var userID: Int, var pkg: String, var name: String, var icon: Drawable, )转java代码
以下是转换后的 Java 代码:
```
public class BoxAppBean {
private int userID;
private String pkg;
private String name;
private Drawable icon;
public BoxAppBean(int userID, String pkg, String name, Drawable icon) {
this.userID = userID;
this.pkg = pkg;
this.name = name;
this.icon = icon;
}
public int getUserID() {
return userID;
}
public void setUserID(int userID) {
this.userID = userID;
}
public String getPkg() {
return pkg;
}
public void setPkg(String pkg) {
this.pkg = pkg;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Drawable getIcon() {
return icon;
}
public void setIcon(Drawable icon) {
this.icon = icon;
}
}
```