}
}
}
}
《Java语言程序设计（基础篇）》（第10版梁勇著）
第十章练习题答案
10.1
PUbliC ClaSS EXerCiSe10_01 {
PUbliC StatiC VOid main(String[] args) {
Time timel = new Time();
SyStem .out. Pri n*tln (11011厂：,,+ timel .getHou^O + ,, Min ute: ,, ÷
timel .getM in ute( ) + ,, SeCOnd : ,, + timel .getSeco nd());
Time time2 = new Time();
SyStem .out. Pri n*tln (11011厂：,,+ time2 .getHou^O + ,, Min ute: ,, ÷
time2. getMinute ( ) + ,, SeCOnd : ,, + time2. getSecond ())； }
}
ClaSS Time {
PriVate int hour;
PriVate int minute;
PriVate int SeCOnd;
PUbliC Time() {
this(System.CUrrentTimeMillis());
}
PUbliC Time(Iong elapsedTime) {
SetTime(elapsedTime);
}
PUbliC Time(int hour^ int minUte? int SeCOnd) {
this.hour = hour;
this.minute = minute;
this.second = SeCOnd;
}
PUbliC int getHour() {
return hour;
}
PUbliC int getMinute() {
return minute;
PUbliC int getSecond() {
return SeCOnd;
}
PUbliC VOid SetTime(IOng elapsedTime) {
// Obtain the total SeCOnds SinCe the midnight^ Jan IJ 1970 IOng totalSecOndS = elapsedTime / 1000;
// COmPUte the CUrrent SeCOnd in the minUte in the HOUr SeCOnd = (int)(totalSeconds % 60);
// Obtain the total minUteS
IOng totalMinutes = totalSeconds / 60;
// COmPUte the CUrrent minutR in the hour
minute = (int)(totalMinutes % 60);
// Obtain the total hours
int totalHours = (int)(totalMinutes / 60);
// COmPUte the CUrrent hour
hour = (int)(totalHours % 24);
}
}
10.2
PUbliC ClaSS EXerCiSe10_02 {
PUbliC StatiC VOid main(String[] args) {
BMl bmil = new BMI(,,3ohn Doe,,. 18, 145java基础第十章答案, 5, 10);
SyStem.out. PrintIn( The BMl for ,, + bmil.getName( ) + l, is ,, + bmil.getBMI() + l, ,, + bmil.getStatus())；
BMl bmi2 = new BMI(,,Peter KingJ 215, 5, 10);
SyStem.out. PrintIn( The BMl for ,, + bmi2.getName( ) + l, is ,, + bmi2.getBMI( ) + l, ,, + bmi2.getStatus())；
}
static ClaSS BMl {
PriVate String name;
PriVate int age;
PriVate double weight; // in POUnds
PriVate double height; // in inCheS
PUbliC final double KILOGRAMS_PER_POUND = 0
PUbliC final double METERS-PER_INCH = 0.0254;
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