AustrianToast/graphprogram_java
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switched to ArrayLists

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The methods findComponents, findBridges and findArticulations are broken.
The main problem lies with findComponents.
This commit is contained in:
René Fuhry 2023-05-15 17:25:15 +02:00 committed by GitHub
parent a66c6af575
commit 62206a962b
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1 changed files with 50 additions and 54 deletions
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104
src/Graph.java
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@ -1,3 +1,4 @@
import java.util.ArrayList;
import java.util.Arrays;
public class Graph {
@ -24,8 +25,8 @@ public class Graph {
calculateExzentrizitäten();
calculateProperties();
findComponents();
findBridges();
findArticulations();
//findBridges();
//findArticulations();
}
public void calculateDistanzMatrix() {
@ -131,7 +132,7 @@ public class Graph {
}
public void findComponents() {
components = new int[wegMatrix.getRowLength()][wegMatrix.getColumnLength()];
ArrayList<int[]> tempComponents = new ArrayList<>(1);
int[] component = new int[wegMatrix.getRowLength()];
for(int rowIndex = 0; rowIndex < wegMatrix.getRowLength(); rowIndex++) {
@ -141,81 +142,77 @@ public class Graph {
index++;
}
}
components[rowIndex] = component;
}
for(int rowIndex = 0; rowIndex < components.length; rowIndex++) {
for(int index = 1; index < components.length; index++) {
if(components[index] != null && components[rowIndex].equals(components[index])) {
components[index] = null;
}
if(tempComponents.contains(component)) {
continue;
}
tempComponents.add(component);
}
components = new int[tempComponents.size()][wegMatrix.getColumnLength()];
for(int rowIndex = 0; rowIndex < components.length; rowIndex++) {
components[rowIndex] = tempComponents.get(rowIndex);
}
}
public int[][] findComponents(Matrix matrix) {
int[][] tempComponents = new int[matrix.getRowLength()][matrix.getColumnLength()];
int[] component = new int[matrix.getRowLength()];
int[][] newComponents;
ArrayList<int[]> tempComponents = new ArrayList<>(1);
int[] component = new int[wegMatrix.getRowLength()];
for(int rowIndex = 0; rowIndex < matrix.getRowLength(); rowIndex++) {
for(int columnIndex = 0, index = 0; columnIndex < matrix.getColumnLength(); columnIndex++) {
if(matrix.getValueAt(rowIndex, columnIndex) == 1) {
for(int rowIndex = 0; rowIndex < wegMatrix.getRowLength(); rowIndex++) {
for(int columnIndex = 0, index = 0; columnIndex < wegMatrix.getColumnLength(); columnIndex++) {
if(wegMatrix.getValueAt(rowIndex, columnIndex) == 1) {
component[index] = columnIndex + 1;
index++;
}
}
tempComponents[rowIndex] = component;
}
if(!zusammenhaengend) {
return null;
}
for(int rowIndex = 0; rowIndex < tempComponents.length; rowIndex++) {
for(int index = 1; index < tempComponents.length; index++) {
if(tempComponents[index] != null && tempComponents[rowIndex].equals(tempComponents[index])) {
tempComponents[index] = null;
}
if(tempComponents.contains(component)) {
continue;
}
tempComponents.add(component);
}
return tempComponents;
newComponents = new int[tempComponents.size()][wegMatrix.getColumnLength()];
for(int rowIndex = 0; rowIndex < newComponents.length; rowIndex++) {
newComponents[rowIndex] = tempComponents.get(rowIndex);
}
return newComponents;
}
public void findBridges() {
if(!zusammenhaengend) {
return;
}
bridges = new int[wegMatrix.getRowLength()][2];
ArrayList<int[]> tempBridges = new ArrayList<>(10);
int[][] newComponents;
int[] bridge = new int[2];
int[] bridge;
for(int i = 0, columnIndex = 0; columnIndex < wegMatrix.getColumnLength(); columnIndex++) {
for(int columnIndex = 0; columnIndex < wegMatrix.getColumnLength(); columnIndex++) {
for(int rowIndex = 0; rowIndex < wegMatrix.getRowLength(); rowIndex++) {
if(rowIndex != 1) {
continue;
}
wegMatrix.insert(rowIndex, columnIndex, 0);
wegMatrix.insert(columnIndex, rowIndex, 0);
bridge = new int[2];
bridge[0] = columnIndex + 1;
bridge[1] = rowIndex + 1;
newComponents = findComponents(wegMatrix);
if(!components.equals(newComponents)) {
bridges[i] = bridge;
i++;
System.out.println(Arrays.toString(bridge));
if(!components.equals(newComponents) && !tempBridges.contains(bridge)) {
System.out.println("bruh");
tempBridges.add(bridge);
}
bridge = null;
wegMatrix.insert(rowIndex, columnIndex, 1);
wegMatrix.insert(columnIndex, rowIndex, 1);
}
}
bridges = new int[tempBridges.size()][2];
for(int rowIndex = 0; rowIndex < bridges.length; rowIndex++) {
for(int index = 1; index < bridges.length; index++) {
if(bridges[index] != null && bridges[rowIndex].equals(bridges[index])) {
bridges[index] = null;
}
}
bridges[rowIndex] = tempBridges.get(rowIndex);
}
}
@ -223,10 +220,10 @@ public class Graph {
if(!zusammenhaengend) {
return;
}
articulations = new int[wegMatrix.getRowLength()];
ArrayList<Integer> tempArticulations = new ArrayList<>(10);
int[][] newComponents;
for(int i = 0, j = 0; i < wegMatrix.getRowLength(); i++) {
for(int i = 0; i < wegMatrix.getRowLength(); i++) {
for(int rowIndex = 0; rowIndex < wegMatrix.getRowLength(); rowIndex++) {
for(int columnIndex = 0; columnIndex < wegMatrix.getColumnLength(); columnIndex++) {
wegMatrix.insert(rowIndex, i, 0);
@ -241,8 +238,7 @@ public class Graph {
newComponents = findComponents(wegMatrix);
if(!components.equals(newComponents)) {
articulations[j] = i + 1;
j++;
tempArticulations.add(i + 1);
}
for(int rowIndex = 0; rowIndex < wegMatrix.getRowLength(); rowIndex++) {
@ -252,6 +248,11 @@ public class Graph {
}
}
}
articulations = new int[tempArticulations.size()];
for(int rowIndex = 0; rowIndex < articulations.length; rowIndex++) {
articulations[rowIndex] = tempArticulations.get(rowIndex);
}
}
public String toString() {
@ -300,12 +301,7 @@ public class Graph {
}
s += "}";
s += "\nArtikulationen: {";
if(articulations[0] != 0) {
s += Arrays.toString(articulations);
}
s += "}";
s += "\nArtikulationen: " + Arrays.toString(articulations);
return s;
}
}