2-D array Random input and Find Biggest Element

Write a java program to find biggest element from matrix using random input : 

import java.util.Random;

import java.util.Scanner;

public class BiggestElementMatrix {

static Random rx=new Random();

public static void main(String[] args) {

System.out.println("Enter a matrix : ");

int [][]mat=readmatrix();

int big=biggestMatrix(mat);

System.out.println("Matrix is ");

dispMat(mat);

System.out.println("Biggest element is : "+big);

}

static int[][] readmatrix(){

Scanner sc=new Scanner(System.in);

System.out.println("Enter Row size and column size :");

int row=sc.nextInt();

int col=sc.nextInt();

int mat[][]=new int[row][col];

System.out.println("Enter Elements in Table : ");

for(int i=0;i<row;i++) {

for(int j=0;j<col;j++) {

mat[i][j]=rx.nextInt(50);

}

}return mat;

}

static int biggestMatrix(int[][] mat) {

int temp=0;

for(int i=0;i<mat.length;i++) {

for(int j=0;j<mat[i].length;j++) {

if(temp<mat[i][j]) {

temp=mat[i][j];

}

}

}return temp;

}

static void dispMat(int mat[][]) {

  for(int i=0;i<mat.length;i++) {

for(int j=0;j<mat[i].length;j++) {

System.out.print(mat[i][j]+" ");

}System.out.println();

}

  }

}