寫(xiě)一個(gè)類(lèi)Student，包含兩個(gè)屬性String name和int age；要求覆蓋toString()方法和equals()方法，使得直接輸出Student對(duì)象時(shí)輸出的是對(duì)象的name和age；并且當(dāng)兩個(gè)對(duì)象的name和age都相同時(shí)認(rèn)為它們相等；然后寫(xiě)一個(gè)主方法測(cè)試以上定義。2,寫(xiě)一個(gè)程序，要求運(yùn)行時(shí)從命令行輸入不同的值打印不同的結(jié)果，若輸入：male則輸出“you are a boy!”；若輸入：female，則輸出“you are a girl!”；若輸入其他值則輸出“you are wrong!!”。
3 回答
ibeautiful
TA貢獻(xiàn)1993條經(jīng)驗(yàn) 獲得超6個(gè)贊
(1)
public class M
{
public static void main(String args[])
{
Students stu1=new Students("Ni",25);
Students stu2=new Students("Wo",30);
stu1.toString();
stu2.toString();
if(stu1.equals(stu2))
System.out.print("they are equal");
}
}
class Students
{
public String name;
public int age;
Students(String name,int age)
{
this.name=name;
this.age=age;
}
public String toString()
{
String str="name is :"+name+'\n'+"age is :"+age;
System.out.println(str);
return str;
}
public boolean equals(Students stu)
{
if((this.name==stu.name)&&(this.age==stu.age))
return true;
else
return false;
}
}
(2)
import java.util.*;
import java.io.*;
public class N
{
public static void main(String args[]) throws IOException
{
Scanner sc=new Scanner(System.in);
System.out.println("請(qǐng)輸入一個(gè)字符串：");
String str=sc.next();
//String str1=new String()
if(str.equals("male"))
System.out.println("you are a boy!");
else if(str.equals("female"))
System.out.println("you are a girl!");
else
System.out.println("you are wrong!!");
}
}
Qyouu
TA貢獻(xiàn)1786條經(jīng)驗(yàn) 獲得超11個(gè)贊
1.
class Student{
String name;
int age;
public Student(String name,int age){
this.name=name;
this.age=age;
}
public String toString(){
return "你的姓名是："+name+"，你的年齡是："+age;
}
public boolean equals(Object another){
return name.equals(another.name)&&age==another.age;
}
}
//測(cè)試程序
public class TestStudent{
public static void main(String[] args){
Student student1,student2,student3;
student1=new Student("邁克爾·杰克遜",50);
student2=new Student("邁克爾·喬丹",50);
student3=new Student("邁克爾·喬丹",50);
System.out.println(student1+(student1.equals(student2)?"等于":"不等于")+student2);
System.out.println(student2+(student2.equals(student3)?"等于":"不等于")+student3);
}
}
2.
public class WhatIsYourSex{
public static void main(String[] args){
if(args.length==1){
if(args[0].equals("male")){
System.out.println("you are a boy!");
}
else if(args[0].equals("female")){
System.out.println("you are a girl!");
}
else{
System.out.println("you are wrong!!");
}
}
else{
System.out.println("you are wrong!!");
}
}
}
神不在的星期二
TA貢獻(xiàn)1963條經(jīng)驗(yàn) 獲得超6個(gè)贊
public class Student{
private String name;
private int age;
Student(String name,int age)
{
this.age = age;
this.name = name;
}
public String toString()
{
return this.name+this.age;
}
public Boolean equals(Object obj)
｛
Boolean isequals;
if(obj.name==this.name&&obj.age==this.age)
{
isequals = true;
}else isequals = false;
return isequals;
}
}
public class testStu{
public static void main(String[] args)
{
Student a1 = new Student("a1",18);
Student a2 = new Student("a1",18);
System.out.println("a1"+a1.toString());
System.out.println("a2"+a2.toString());
if(a1.equals(a2))
{
System.out.println("a1 equals a2");
} else System.out.println("a1 不等于 a2");
}
}
2：
public class test{
public static void main(String[] agcs)
{
try{
String flag = agcs[0];
switch(flag)
{
case "male":
System.out.println("you are a boy!");
break;
case "female":
System.out.println("you are a girl!");
break;
default:
System.out.println("you are wrong!!");
break;
}
}catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("沒(méi)有輸入?yún)?shù)");
}
}
}
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