「java分数类型」java分数转小数的方法
本篇文章给大家谈谈java分数类型，以及java分数转小数的方法对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
用java怎么写分数？
你可以写个分数类,下面是参考:
public class Fraction {
private Integer numerator; // 分子;
private Integer denominator; // 分母
/**
* 构造器
*/
public Fraction() {
}
public Fraction(Integer numerator, Integer denominator) {
this.numerator = numerator;
this.denominator = denominator;
}
public Integer getDenominator() {
return denominator;
}
public void setDenominator(Integer denominator) {
this.denominator = denominator;
}
public Integer getNumerator() {
return numerator;
}
public void setNumerator(Integer numerator) {
this.numerator = numerator;
}
/**
* 求最大公约数
*
* @return
*/
private int getGCD(int a, int b) {
int max = Math.max(a, b);
int min = Math.min(a, b);
int mod = max % min;
if (mod == 0) {
return min;
} else {
return this.getGCD(mod, min);
}
}
/**
* 简化和约分
*
* @return
*/
public Fraction simplify() {
// 格式化
if (this.numerator == 0) {
this.denominator = null;
return this;
} else if (this.denominator * this.numerator 0
this.denominator 0) {
this.denominator = Math.abs(this.denominator);
this.numerator = Math.abs(this.numerator);
return this;
} else if (this.denominator 0) {
this.denominator = Math.abs(this.denominator);
this.numerator = -this.numerator;
return this;
}
// 约分
int gcd = this.getGCD(Math.abs(denominator), Math.abs(numerator));
if (gcd == 1) {
return this;
} else {
this.denominator = this.denominator / gcd;
this.numerator = this.numerator / gcd;
return this;
}
}
/**
* 加法
*
* @param fraction
* @return
*/
public Fraction add(Fraction fraction) {
Integer resultDenominator = Math.abs(this.denominator)
* Math.abs(fraction.getDenominator());
Integer resultNumerator = this.numerator * fraction.getDenominator()
+ this.denominator * fraction.getNumerator();
Fraction result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
* 减法
*
* @param fraction
* @return
*/
public Fraction minus(Fraction fraction) {
Integer resultDenominator = Math.abs(this.denominator)
* Math.abs(fraction.getDenominator());
Integer resultNumerator = this.numerator * fraction.getDenominator()
- this.denominator * fraction.getNumerator();
Fraction result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
* 乘法
*
* @param fraction
* @return
*/
public Fraction multiply(Fraction fraction) {
Fraction result = null;
if (this.numerator == 0 || fraction.numerator == 0) {
result = new Fraction(0, null);
}
Integer resultDenominator = this.denominator
* fraction.getDenominator();
Integer resultNumerator = this.numerator * fraction.getNumerator();
result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
*除法
*
* @param fraction
* @return
*/
public Fraction divide(Fraction fraction) {
Fraction result = null;
if (this.numerator == 0) {
result = new Fraction(0, null);
}
Integer resultDenominator = this.denominator * fraction.getNumerator();
Integer resultNumerator = this.numerator * fraction.getDenominator();
result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
@Override
public String toString() {
return "[分子]" + this.numerator + "-[分母]" + this.denominator;
}
/**
* 测试
*
* @param args
*/
public static void main(String[] args) {
Fraction f1 = new Fraction(1, 2);
Fraction f2 = new Fraction(2, 4);
System.out.println(f1);
System.out.println(f2);
System.out.println(f2.simplify());
System.out.println(f1.add(f2));
System.out.println(f1.minus(f2));
System.out.println(f1.multiply(f2));
System.out.println(f1.divide(f2));
}
}
java的基本数据类型有哪些
四种八类：
基本数据类型
整数类型：
byte：字节占用 1字节 8位，用来表达最小的数据单位，储存数据长度为 正负 127；
short：字节占用 2字节 16位，储存数值长度为 -32768-32767
int：字节占用 4字节 32位，最为常用的整数类型，储存长度为，-2^31-1~2^31 （21 亿）
long：字节占用 8字节 64位，当到达int数值极限时使用，储存长度为 看图片：
浮点数类型：
float：单精度浮点型 32位 取值范围 3.4e-38~3.4e-38
double：双精度浮点型 64位 ，java中默认的浮点类型 取值范围 1.7e-308~1.7e-308
字符类型：
char：16位 ，java字符使用Unicode编码；
布尔类型
boolean ： true 真 和 false 假
引用数据类型：
类 class
接口 interface
数组
JAVA中有分数数据类型吗？
没有分数类型，而且在计算中如果出现较长的小数或者无限循环、不循环小数，都会丢失精度，每个数据类型都有自己的精度范围，超出部分就丢失了
java习题 怎么写分数
你可以写个分数类,下面是参考:
public class Fraction {
private Integer numerator; // 分子;
private Integer denominator; // 分母
/**
* 构造器
*/
public Fraction() {
}
public Fraction(Integer numerator, Integer denominator) {
this.numerator = numerator;
this.denominator = denominator;
}
public Integer getDenominator() {
return denominator;
}
public void setDenominator(Integer denominator) {
this.denominator = denominator;
}
public Integer getNumerator() {
return numerator;
}
public void setNumerator(Integer numerator) {
this.numerator = numerator;
}
/**
* 求最大公约数
*
* @return
*/
private int getGCD(int a, int b) {
int max = Math.max(a, b);
int min = Math.min(a, b);
int mod = max % min;
if (mod == 0) {
return min;
} else {
return this.getGCD(mod, min);
}
}
/**
* 简化和约分
*
* @return
*/
public Fraction simplify() {
// 格式化
if (this.numerator == 0) {
this.denominator = null;
return this;
} else if (this.denominator * this.numerator 0
this.denominator 0) {
this.denominator = Math.abs(this.denominator);
this.numerator = Math.abs(this.numerator);
return this;
} else if (this.denominator 0) {
this.denominator = Math.abs(this.denominator);
this.numerator = -this.numerator;
return this;
}
// 约分
int gcd = this.getGCD(Math.abs(denominator), Math.abs(numerator));
if (gcd == 1) {
return this;
} else {
this.denominator = this.denominator / gcd;
this.numerator = this.numerator / gcd;
return this;
}
}
/**
* 加法
*
* @param fraction
* @return
*/
public Fraction add(Fraction fraction) {
Integer resultDenominator = Math.abs(this.denominator)
* Math.abs(fraction.getDenominator());
Integer resultNumerator = this.numerator * fraction.getDenominator()
+ this.denominator * fraction.getNumerator();
Fraction result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
* 减法
*
* @param fraction
* @return
*/
public Fraction minus(Fraction fraction) {
Integer resultDenominator = Math.abs(this.denominator)
* Math.abs(fraction.getDenominator());
Integer resultNumerator = this.numerator * fraction.getDenominator()
- this.denominator * fraction.getNumerator();
Fraction result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
* 乘法
*
* @param fraction
* @return
*/
public Fraction multiply(Fraction fraction) {
Fraction result = null;
if (this.numerator == 0 || fraction.numerator == 0) {
result = new Fraction(0, null);
}
Integer resultDenominator = this.denominator
* fraction.getDenominator();
Integer resultNumerator = this.numerator * fraction.getNumerator();
result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
/**
*除法
*
* @param fraction
* @return
*/
public Fraction divide(Fraction fraction) {
Fraction result = null;
if (this.numerator == 0) {
result = new Fraction(0, null);
}
Integer resultDenominator = this.denominator * fraction.getNumerator();
Integer resultNumerator = this.numerator * fraction.getDenominator();
result = new Fraction(resultNumerator, resultDenominator);
return result.simplify();
}
@Override
public String toString() {
return "[分子]" + this.numerator + "-[分母]" + this.denominator;
}
/**
* 测试
*
* @param args
*/
public static void main(String[] args) {
Fraction f1 = new Fraction(1, 2);
Fraction f2 = new Fraction(2, 4);
System.out.println(f1);
System.out.println(f2);
System.out.println(f2.simplify());
System.out.println(f1.add(f2));
System.out.println(f1.minus(f2));
System.out.println(f1.multiply(f2));
System.out.println(f1.divide(f2));
}
}
java分数类型的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java分数转小数的方法、java分数类型的信息别忘了在本站进行查找喔。