1.
public class Summary {
public static void main(String[] args) {
// TODO Auto-generated method stub
int summary=0;
int i=0;
while(i<100){
i++;
summary+=i;
}
System.out.println("1+2+3+...99+100="+summary);
}
}
2.
public class TestArray2
{
public static void main(String[] args)
{
double arr[]={1.1,2.2,3.3,4.4,5.5};
System.out.println(“第一个变量为: “+arr[0]);
System.out.println(“第五个变量为: “+arr[4]);
}
}
3.
public class Student {
private String name ;
int age;
boolean sex;
int score;
public Student(String name, int age, boolean sex, int score) {
super();
this.name = name;
this.age = age;
this.sex = sex;
this.score = score;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
if (sex==true) {
return "男";
}
return "女";
}
public void setSex(boolean sex) {
this.sex = sex;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public static void main(String[] args) {
Student s= new Student("黄世仁", 24, true, 59);
System.out.println("姓名:"+s.getName());
System.out.println("年龄:"+s.getAge());
System.out.println("性别:"+s.getSex());
System.out.println("分数:"+s.getScore());
}
}