新增 Ref

src/main/java/xyz/zhouxy/plusone/commons/base/DoubleRef.java

@@ -0,0 +1,55 @@
+package xyz.zhouxy.plusone.commons.base;
+
+import java.util.function.DoubleUnaryOperator;
+
+import com.google.common.annotations.Beta;
+
+@Beta
+public class DoubleRef {
+
+    private double value;
+
+    public DoubleRef(double value) {
+        this.value = value;
+    }
+
+    public double getValue() {
+        return value;
+    }
+
+    public void setValue(double value) {
+        this.value = value;
+    }
+
+    public void apply(DoubleUnaryOperator operator) {
+        this.value = operator.applyAsDouble(this.value);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("DoubleRef[%s]", value);
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        long temp;
+        temp = Double.doubleToLongBits(value);
+        result = prime * result + (int) (temp ^ (temp >>> 32));
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final DoubleRef other = (DoubleRef) obj;
+        return Double.doubleToLongBits(value) == Double.doubleToLongBits(other.value);
+    }
+
+}