Merge pull request coderolls#5 from coderolls/java-basic/double-to-int

gauravkukade · web-flow · commit f590fd2eb59f · 2021-03-05T00:23:23.000+05:30
Add java programs to convert double to int in java
diff --git a/java-basic/DoubleToIntUsingIntValueMethod.java b/java-basic/DoubleToIntUsingIntValueMethod.java
@@ -0,0 +1,25 @@
+/**
+ * 
+ * A java program to convert double to int using 
+ * Double.intValue() method  
+ * @author Gaurav Kukade at coderolls.com
+ * 
+ **/
+public class DoubleToIntUsingIntValueMethod{
+
+     public static void main(String []args){
+
+        double doubleValue = 82.14; // 82.14
+        
+        System.out.println("doubleValue: "+doubleValue);
+        
+        //create Double wrapper object
+        Double doubleValueObject = new Double(doubleValue);
+        
+        
+        //typecase double to int
+        int intValue = doubleValueObject.intValue(); // 82
+        
+        System.out.println("intValue: "+intValue);
+     }
+}
diff --git a/java-basic/DoubleToIntUsingRoundMethod.java b/java-basic/DoubleToIntUsingRoundMethod.java
@@ -0,0 +1,34 @@
+/** 
+ * A java program to convert double to int using 
+ * Math.round() method 
+ * @author Gaurav Kukade at coderolls.com
+ **/
+public class DoubleToIntUsingRoundMethod{
+
+     public static void main(String []args){
+        
+        // case 1
+        double doubleValue = 82.14; // 82.14
+        
+        System.out.println("doubleValue: "+doubleValue);
+        
+        //typecase double to int
+        int intValue = (int) Math.round(doubleValue); // 82
+        
+        System.out.println("intValue: "+intValue);
+        
+        System.out.println();
+        
+        // case 2
+        double nextDoubleValue = 82.99; // 
+
+        
+        System.out.println("nextDoubleValue: "+nextDoubleValue);
+        
+        // Math.round(nextDoubleValue) returns long value
+        //typecase long to int
+        int nextIntValue = (int) Math.round(nextDoubleValue); // 83
+        
+        System.out.println("nextIntValue: "+nextIntValue);              
+     }
+}
diff --git a/java-basic/DoubleToIntUsingTypecasting.java b/java-basic/DoubleToIntUsingTypecasting.java
@@ -0,0 +1,18 @@
+/**
+ * A java program to convert double to int using typecasting 
+ * @author Gaurav Kukade at coderolls.com
+ **/
+public class DoubleToIntUsingTypecasting{
+
+     public static void main(String []args){
+        
+        double doubleValue = 82.14; // 82.14
+        
+        System.out.println("doubleValue: "+doubleValue);
+        
+        //typecase double to int
+        int intValue = (int) doubleValue; // 82
+        
+        System.out.println("intValue: "+intValue);
+     }
+}
