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Naveen KhuntetaNaveen Khunteta
Naveen Khunteta
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Naveen Khunteta
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Data types and String concatenation
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‎.classpath‎

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>

‎.project‎

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>MorningJavaSessions</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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</natures>
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</projectDescription>

‎.settings/org.eclipse.jdt.core.prefs‎

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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.8
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.8

‎bin/JavaSessions/DataTypes.class‎

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‎bin/JavaSessions/StringConcatenation.class‎

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‎src/JavaSessions/DataTypes.java‎

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package JavaSessions;
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public class DataTypes {
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//8:30 AM IST
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//this is my first java code
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/*this is my java code
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and I'm so happy
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data types concept*/
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public static void main(String[] args) {
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//Primitive Data types: int, double, boolean, char
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//Non Primitive Data Types: String, Array
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//1. int (4 bytes): byte (1byte), long(8 bytes), short(2 bytes)
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int i = 10;
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i = 20;
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int i1 = 20;
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int j = 100;
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int k = -10;
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int p = 0;
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int age = 25;
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System.out.println(i);
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System.out.println(age);
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System.out.println(i+j);
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//2. double (8bytes), float(4 bytes)
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double d1 = 12.33;
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double d2 = -12.33;
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double d3 = 100; //100.00
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System.out.println(d1);
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//3. char:
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char c1 = 'a';
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char c2 = '$';
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char c3 = '1';
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char gender = 'M';
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//4. boolean:
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boolean b1 = true;
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boolean b2 = false;
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//String: is a class in java
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String s1 = "Hello World";
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String s2 = "Selenium";
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String s3 = "Hi this is my java code";
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String s4 = "1000";
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String s5 = "12.33";
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System.out.println(s1);
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System.out.println(s4);
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System.out.println(100);
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System.out.println("Hello Testing");
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System.out.println(s1+s2);
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}
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}

‎src/JavaSessions/StringConcatenation.java‎

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package JavaSessions;
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public class StringConcatenation {
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public static void main(String[] args) {
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int a = 100;
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int b = 200;
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String x = "Hello";
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String y = "World";
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System.out.println("the sum of a and b is:"+(a+b));
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System.out.println(a+b);
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System.out.println(x+y);
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System.out.println(a+b+x+y);//error, 300HelloWorld, 300HelloWorld,
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//300HelloWorld, 300HelloWorld, 300HelloWorld, 300HelloWorld
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System.out.println(x+y+a+b);
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//HelloWorld300, HelloWorld100200, HelloWorld300,
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//HelloWorld100200, HelloWorld300, HelloWorld100200,
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//HelloWorld300
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System.out.println(x+y+(a+b));
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//HelloWorld100200,HelloWorld300,HelloWorld300,
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//HelloWorld300, HelloWorld300, HelloWorld300,
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//HelloWorld300
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double d1 = 12.33;
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double d2 = 10.33;
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System.out.println(x+y+d1+d2);
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System.out.println(d1+d2+x+y);
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int i = 10;
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System.out.println("the value of i is:" + i );
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long id = 12345;
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System.out.println("your transaction id is "+ id);
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}
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}

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