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src/main/java/org/dromara/easyai/tools/ArithUtil.java

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+package org.dromara.easyai.tools;
+
+
+import java.math.BigDecimal;
+
+public class ArithUtil {
+    private static final int DEF_DIV_SCALE = 10;
+
+    private ArithUtil() {
+    }
+
+    public static float add(float d1, float d2) {//加法
+        BigDecimal b1 = new BigDecimal(Float.toString(d1));
+        BigDecimal b2 = new BigDecimal(Float.toString(d2));
+        return b1.add(b2).floatValue();
+
+    }
+
+    public static float sub(float d1, float d2) {//减法
+        BigDecimal b1 = new BigDecimal(Float.toString(d1));
+        BigDecimal b2 = new BigDecimal(Float.toString(d2));
+        return b1.subtract(b2).floatValue();
+
+    }
+
+    public static float mul(float d1, float d2) {//乘法
+        BigDecimal b1 = new BigDecimal(Float.toString(d1));
+        BigDecimal b2 = new BigDecimal(Float.toString(d2));
+        return b1.multiply(b2).floatValue();
+
+    }
+
+    public static float div(float d1, float d2) {//除法
+
+        return div(d1, d2, DEF_DIV_SCALE);
+
+    }
+
+    public static float div(float d1, float d2, int scale) {
+        if (scale < 0) {
+            throw new IllegalArgumentException("The scale must be a positive integer or zero");
+        }
+        BigDecimal b1 = new BigDecimal(Float.toString(d1));
+        BigDecimal b2 = new BigDecimal(Float.toString(d2));
+        return b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).floatValue();
+
+    }
+
+}