public String toString(){ return String.format("result:%s" + "\n" + "name:%s" + name + "\n" + "empNo:%.0f" + empNo + "\n" + "baseSalary:%.1f" + baseSalary + "\n" + "WageOfHour:%.1f" + wageOfHour+ "\n" + "workHourOfmonthly:%.0f" + workHourOfMonthly+ "\n"); 是否有格式化问题
时间: 2023-07-03 13:23:36 浏览: 49
有一个小的格式化问题,您的代码中缺少了一个空格。在字符串 "name:%s" 和变量 name 之间应该有一个空格。修复后的代码如下所示:
```
public String toString() {
return String.format("result:%s" + "\n"
+ "name: %s" + "\n"
+ "empNo: %.0f" + "\n"
+ "baseSalary: %.1f" + "\n"
+ "WageOfHour: %.1f" + "\n"
+ "workHourOfmonthly: %.0f" + "\n",
result, name, empNo, baseSalary, wageOfHour, workHourOfMonthly);
}
```
注意到我还根据您的代码中的变量名修复了代码,以便使其更加准确。
相关问题
public String toString() { return "name: " + name + ", number: " + number; }这段代码会报错
如果这段代码报错了,有可能是因为在Student类中定义的两个Map变量没有使用,也就是说,这两个变量在程序中没有被初始化或赋值,而且也没有被使用,所以可以删除这两个变量,或者在构造函数中初始化它们。
如果删除这两个变量,可以将Student类修改为以下代码:
```
class Student {
private String name;
private int number;
public Student(String name, int number) {
this.name = name;
this.number = number;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
@Override
public String toString() {
return "name: " + name + ", number: " + number;
}
}
```
如果想要保留这两个变量,可以在构造函数中初始化它们,如下:
```
class Student {
private String name;
private int number;
private Map<String,Integer> hashMap;
private Map<String,Integer> hashMap1;
public Student(String name, int number) {
this.name = name;
this.number = number;
this.hashMap = new HashMap<>();
this.hashMap1 = new HashMap<>();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
@Override
public String toString() {
return "name: " + name + ", number: " + number;
}
}
```
在这两种情况下,都可以使用toString方法输出学生的姓名和学号。
String timeStr = String.format("%02d:%02d:%02d", hour, minute, second);的参数都是int,转化成String
在Java中,可以将int类型的变量转换成String类型的变量,常用的有以下几种方法:
1. 使用String.valueOf()方法:
```
String hourStr = String.valueOf(hour);
String minuteStr = String.valueOf(minute);
String secondStr = String.valueOf(second);
String timeStr = hourStr + ":" + minuteStr + ":" + secondStr;
```
2. 使用Integer.toString()方法:
```
String hourStr = Integer.toString(hour);
String minuteStr = Integer.toString(minute);
String secondStr = Integer.toString(second);
String timeStr = hourStr + ":" + minuteStr + ":" + secondStr;
```
3. 使用String.format()方法:
```
String hourStr = String.format("%02d", hour);
String minuteStr = String.format("%02d", minute);
String secondStr = String.format("%02d", second);
String timeStr = hourStr + ":" + minuteStr + ":" + secondStr;
```
其中,`%02d`表示将整数格式化为2位的带前导零的十进制数,确保小时、分钟和秒数都是2位数,并且前导零用于填充单个数字。