From ca48af6971274683347ca246ad25a877e74c41bd Mon Sep 17 00:00:00 2001
From: Andrei Punko <andd3dfx@gmail.com>
Date: Fri, 18 Oct 2024 13:41:59 +0300
Subject: [PATCH] Make Interval.reborn(left,right,h/n) method private. Add
 reborn(h/n) instead

---
 src/main/java/by/andd3dfx/math/Interval.java         | 12 ++++++++++--
 .../java/by/andd3dfx/math/pde/equation/Equation.java |  4 ++--
 src/test/java/by/andd3dfx/math/IntervalTest.java     |  8 ++++----
 3 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/src/main/java/by/andd3dfx/math/Interval.java b/src/main/java/by/andd3dfx/math/Interval.java
index aefeeb8..bd610e1 100644
--- a/src/main/java/by/andd3dfx/math/Interval.java
+++ b/src/main/java/by/andd3dfx/math/Interval.java
@@ -38,7 +38,7 @@ public int n() {
         return n;
     }
 
-    public void reborn(double left, double right, double h) {
+    private void reborn(double left, double right, double h) {
         assert (left < right && h > 0 && h <= right - left);
 
         this.left = left;
@@ -47,7 +47,7 @@ public void reborn(double left, double right, double h) {
         this.n = (int) Math.floor((right - left) / h);    // если необходимо, n будет на 1 больше
     }
 
-    public void reborn(double left, double right, int n) {
+    private void reborn(double left, double right, int n) {
         assert (left < right && n > 0);
 
         this.left = left;
@@ -67,4 +67,12 @@ public int i(double x) {
 
         return (int) ((x - left) / h);
     }
+
+    public void reborn(double h) {
+        reborn(left, right, h);
+    }
+
+    public void reborn(int n) {
+        reborn(left, right, n);
+    }
 }
diff --git a/src/main/java/by/andd3dfx/math/pde/equation/Equation.java b/src/main/java/by/andd3dfx/math/pde/equation/Equation.java
index 0762f06..fde78a9 100644
--- a/src/main/java/by/andd3dfx/math/pde/equation/Equation.java
+++ b/src/main/java/by/andd3dfx/math/pde/equation/Equation.java
@@ -81,8 +81,8 @@ protected double gF(double x, double t, double U) {
 
     protected void prepare(double h, double tau) {
         assert (h > 0 && tau > 0);                      // установка шагов по пространственной и временной координатам
-        area.x().reborn(area.x().left(), area.x().right(), h);
-        area.t().reborn(area.t().left(), area.t().right(), tau);
+        area.x().reborn(h);
+        area.t().reborn(tau);
 
         arr = new Matrix(area.t().n() + 1, area.x().n() + 1); // Место для решения уравнения
         for (var i = 0; i <= area.x().n(); i++) {
diff --git a/src/test/java/by/andd3dfx/math/IntervalTest.java b/src/test/java/by/andd3dfx/math/IntervalTest.java
index 425e8d0..8896779 100644
--- a/src/test/java/by/andd3dfx/math/IntervalTest.java
+++ b/src/test/java/by/andd3dfx/math/IntervalTest.java
@@ -38,9 +38,9 @@ void paramsConstructorWithH() {
 
     @Test
     void rebornWithN() {
-        var interval = new Interval(2.5, 10.5, 10);
+        var interval = new Interval(5.0, 10.0, 10);
 
-        interval.reborn(5.0, 10.0, 100);
+        interval.reborn(100);
 
         assertThat(interval.left()).isEqualTo(5.0);
         assertThat(interval.right()).isEqualTo(10.0);
@@ -50,9 +50,9 @@ void rebornWithN() {
 
     @Test
     void rebornWithH() {
-        var interval = new Interval(2.5, 10.5, 10);
+        var interval = new Interval(5.0, 10.0, 10);
 
-        interval.reborn(5.0, 10.0, 0.2);
+        interval.reborn(0.2);
 
         assertThat(interval.left()).isEqualTo(5.0);
         assertThat(interval.right()).isEqualTo(10.0);