Add java programs to convert double to int in java

java-basic/DoubleToIntUsingIntValueMethod.java

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+/**
+ * 
+ * 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);
+     }
+}

java-basic/DoubleToIntUsingRoundMethod.java

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+/** 
+ * 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);              
+     }
+}

java-basic/DoubleToIntUsingTypecasting.java

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+/**
+ * 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);
+     }
+}