move constructors to java lang module

2018-11-22 22:59:37 +02:00
parent 668aa4a583
commit 4c1f773d07
4 changed files with 1 additions and 0 deletions
@@ -0,0 +1,56 @@
+package com.baeldung.constructors;
+
+import java.time.LocalDateTime;
+
+class BankAccount {
+    String name;
+    LocalDateTime opened;
+    double balance;
+    
+    @Override
+    public String toString() {
+        return String.format("%s, %s, %f", this.name, this.opened.toString(), this.balance);
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public LocalDateTime getOpened() {
+        return opened;
+    }
+
+    public double getBalance() {
+        return this.balance;
+    }
+}
+
+class BankAccountEmptyConstructor extends BankAccount {
+    public BankAccountEmptyConstructor() {
+        this.name = "";
+        this.opened = LocalDateTime.now();
+        this.balance = 0.0d;
+    }
+}
+
+class BankAccountParameterizedConstructor extends BankAccount {
+    public BankAccountParameterizedConstructor(String name, LocalDateTime opened, double balance) {
+        this.name = name;
+        this.opened = opened;
+        this.balance = balance;
+    }
+}
+
+class BankAccountCopyConstructor extends BankAccount {
+    public BankAccountCopyConstructor(String name, LocalDateTime opened, double balance) {
+        this.name = name;
+        this.opened = opened;
+        this.balance = balance;
+    }
+        
+    public BankAccountCopyConstructor(BankAccount other) {
+        this.name = other.name;
+        this.opened = LocalDateTime.now();
+        this.balance = 0.0f;
+    }
+}
@@ -0,0 +1,25 @@
+package com.baeldung.constructors;
+
+import java.time.LocalDateTime;
+
+class Transaction {
+    final BankAccountEmptyConstructor bankAccount;
+    final LocalDateTime date;
+    final double amount;
+
+    public Transaction(BankAccountEmptyConstructor account, LocalDateTime date, double amount) {
+        this.bankAccount = account;
+        this.date = date;
+        this.amount = amount;
+    }
+
+    /*
+     * Compilation Error :'(, all final variables must be explicitly initialised.
+     * public Transaction() {
+     * }
+     */
+
+    public void invalidMethod() {
+        // this.amount = 102.03; // Results in a compiler error. You cannot change the value of a final variable.
+    }    
+}