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Added Resize for Stacks #145

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Merged
merged 1 commit into from
Oct 27, 2017
Merged

Added Resize for Stacks #145

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19 changes: 17 additions & 2 deletions data_structures/Stacks/Stacks.java
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ public void push(int value){
top++;
stackArray[top] = value;
}else{
System.out.println("The stack is full, can't insert value");
resize(maxSize*2);
}
}

Expand All @@ -54,7 +54,12 @@ public void push(int value){
public int pop(){
if(!isEmpty()){ //Checks for an empty stack
return stackArray[top--];
}else{
}

if(top < maxSize/4){
resize(maxSize/2);
}
else{
System.out.println("The stack is already empty");
return -1;
}
Expand All @@ -74,6 +79,16 @@ public int peek(){
}
}

private void resize(int newSize){
private int[] transferArray = new int[newSize];

for(int i = 0; i < stackArray.length(); i++){
transferArray[i] = stackArray[i];
stackArray = transferArray;
}
maxSize = newSize;
}

/**
* Returns true if the stack is empty
*
Expand Down