本篇文章主要介绍了"BigDecimal的用法"，主要涉及到方面的内容，对于Javajrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播感兴趣的同学可以参考一下：
@Test
public void bigDecimalPrecision(){System.out.println(new Double(0.07));//0...
@Test
public void bigDecimalPrecision(){
System.out.println(new Double(0.07));//0.07
System.out.println(0.06);//0.06
System.out.println(0.06+0.01);//0.06999999999999999
System.out.println(0.07);//0.07
System.out.println(1.0-0.42);//0.5800000000000001
System.out.println(4.015*100);//401.49999999999994
System.out.println(303.1/1000);//0.30310000000000004
BigDecimal b1 = new BigDecimal(Double.toString(0.07));//0.07
BigDecimal b2 = new BigDecimal("0.07");//0.07
BigDecimal b3 = new BigDecimal(0.07);//0.070000000000000006661338147750939242541790008544921875
BigDecimal b4 = new BigDecimal(Double.valueOf(0.07));//0.070000000000000006661338147750939242541790008544921875
BigDecimal b5 = new BigDecimal(Double.valueOf("0.07"));//0.070000000000000006661338147750939242541790008544921875
System.out.println(b1);
System.out.println(b2);
System.out.println(b3);
System.out.println(b4);
System.out.println(b5);
System.out.println("___________________________________");
BigDecimal b6 = new BigDecimal(0.58);
BigDecimal b7 = new BigDecimal(100L);
System.out.println(b6.multiply(b7).toString());
System.out.println(b6.multiply(b7).toPlainString());
System.out.println("___________________________________");
BigDecimal a = new BigDecimal(0.58);//a: 0.57999999999999996003197111349436454474925994873046875
BigDecimal b = new BigDecimal(0.580);//b: 0.57999999999999996003197111349436454474925994873046875
BigDecimal c = new BigDecimal("0.58");//0.58
BigDecimal d = new BigDecimal("0.580");//0.580
BigDecimal e = BigDecimal.valueOf(0.58);//0.58
BigDecimal f = BigDecimal.valueOf(0.580);//0.58
System.out.println("a: "+a);
System.out.println("b: "+b);
System.out.println("c: "+c);
System.out.println("d: "+d);
System.out.println("e: "+e);
System.out.println("f: "+f);
System.out.println(a.equals(b));//true
System.out.println(a.compareTo(b));//0
System.out.println(c.equals(d));//false
System.out.println(c.compareTo(d));//0
System.out.println(e.equals(f));//true
System.out.println(e.compareTo(f));//0
System.out.println(a.equals(c));//false
System.out.println(a.compareTo(c));//-1
System.out.println(b.equals(d));//false
System.out.println(b.compareTo(d));//-1
System.out.println(c.equals(e));//true
System.out.println(c.compareTo(e));//0
//toString()默认，科学计数法
System.out.println(BigDecimal.valueOf(0.0000000058).toString());//5.8E-8
System.out.println(BigDecimal.valueOf(0.0000000058).toPlainString());//0.000000058
}
版权声明：本文为博主原创文章，未经博主允许不得转载。
以上就介绍了BigDecimal的用法，包括了方面的内容，希望对Javajrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播有兴趣的朋友有所帮助。
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