Constructor with Arguments

Constructors can be created with any kinds of arguments.

public class TestClass {

private String testData;

public TestClass(String testData) { this.testData = testData; }

}

Called like this:

TestClass testClass = new TestClass("Test Data");

A class can have multiple constructors with different signatures. To chain constructor calls (call a different constructor of the same class when instantiating) use this().

public class TestClass {

private String testData;

public TestClass(String testData) { this.testData = testData; }

public TestClass() { this(“Test”); // testData defaults to “Test” }

}

Called like this:

TestClass testClass1 = new TestClass("Test Data");
TestClass testClass2 = new TestClass();